PROJECT GALLERY — RS / RSR / IROC / IMSA

1975 911 RSR Backdate 3.8L Engine Conversion and more!

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1975 911 RSR Backdate 3.8L Engine Conversion and more!

This 1975 911 was backdated to a 1973 RSR style and received our 993 3.6L to 3.8L motor package. The car also had a fully adjustable RSR style suspension installed.  The 915 transmission was also addressed and we installed a lightweight stage 1 flywheel and clutch for improved throttle response and smooth engagement.  A limited slip differential helps keep the power planted on exit.  A 993 turbo brake package was installed to enhance stopping power as well. Enjoy the video!                               

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1986 911 RSR Turbo Backdate

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1986 911 RSR Turbo Backdate

2019 Werks Reunion Winner           View this post on Instagram 911 RSR Turbo - dyno tune Sunday #patrickmotorsports #porscheracing #porscherestoration #porsche911 #porscheturbo #drivetastefully #aircooledporsche #911turbo #rsrturbo #porscherestoration #porscheengine #porsche #carreraturbo #luftgekühlt #motec #g50 A post shared by PATRICK MOTORSPORTS (@patrickmotorsports) on Aug 4, 2019 at 1:58pm PDT     Complete interior work is performed in house, top premium leather, Tartan wool, Alcantara, to name a few. We installed the PORSCHE classic Radio 911.645.290.00 that offers Bluetooth for hands free calling and music playback.  Electric Air conditioning keeps the driver cool without the need for a compressor to...

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1975 to 1973 911 RSR Twin-Turbo Backdate

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1975 to 1973 911 RSR Twin-Turbo Backdate

Porsche 1975 backdate 1973 RSR Twin-Turbo. Starting with a beautiful, rust-free chassis backdate with exceptional attention to detail. We have backdated many of our custom build-to-suit client requests. Rust-free chassis back to basics before the complete overhaul begins!         911 RSR TURBO with fuel system installed. 911 RSR Twin-Turbo showcasing a center-fill Fuel Safe Fuel Cell.  Fuel Safe Center Fill Fuel Cell 911 RSR Twin-Turbo with our dual brake master cylinder kit installed.  Dual Brake Master Cylinder Kit - Part# BRA 911 355 DBMCL PMS (Link) 911 RSR Twin-Turbo dual brake master cylinder installation Rotisserie paint work...

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Grand Prix White 1984 911 Carrera to 911 ST Long Hood 3.8L Varioram Euro RS G50 SBH Upgrade Conversion

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Grand Prix White 1984 911 Carrera to 911 ST Long Hood 3.8L Varioram Euro RS G50 SBH Upgrade Conversion

We started with a customer supplied 1984 911 Carrera 3.2L, first complete disassembly and evaluation. Then conversion to long hood early ST configuration. This will be powered by a 1996 993 v-ram configured to 3.8l Euro RS spec.. We will be using our G50 short bell housing gearbox. Take a look at the interior detail!            Porsche 911 GT3 Sport Muffler For Early 911 / 914-6 GT (EXH 911 GT3 SM PMS - Store Link) 1984 911 Carrera 3.2L to 911 ST Conversion With 3.8L 993 Varioram and G50 Fitment Of The HID Light System In...

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1973 911 RSR 3.8L Backdate Upgrade Conversion

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1973 911 RSR 3.8L Backdate Upgrade Conversion

This 1974 to 1973 backdate 911 got a complete tear down, rebuild and upgrade package with a 3.8L engine, RSR bodywork, coilover suspension, and custom interior. Here is how it arrived at our facility as a roller with no engine or transmission:   No expense was spared with the suspension & brakes either. The car uses 993 Turbo 'Big Red' brakes with a fully adjustable RSR coilover suspension.Some of the parts include: - Rear Spring Plate Set - 935 RSR - (1965-1989) PORSCHE 911 / 930 Turbo (911 331 935 R 01)- RSR Lightweight Front Control Arm & Cross Member Suspension...

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Sahara Beige 1974 911 Carrera To 911 3.6L Twin Turbo RSR G50-50 Upgrade Conversion

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Sahara Beige 1974 911 Carrera To 911 3.6L Twin Turbo RSR G50-50 Upgrade Conversion

This original 1974 Carrera has been converted to an all steel RSR wide body, and fitted with a 993 Twin Turbo EFI engine and G-50/50 transaxle. It has also had a 1989 930 torsion tube conversion that allows the fitment of 930 rear trailing arms! Of course it has all 930 brakes & suspension. Take a look at our custom Twin Turbo Duck Tail!                

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1979 930 Turbo to 1974 911 RSR IROC 3.8L DME Euro 915 Upgrade Conversion

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1979 930 Turbo to 1974 911 RSR IROC 3.8L DME Euro 915 Upgrade Conversion

This original 1979 930 Turbo 3.3L chassis has been expertly converted to a lightweight 1974 911 RSR IROC inspired street racer! This chassis is fitted with a 1997, 993 Carrera 3.6L DME engine then converted to a high torque 3.8L displacement! Featuring hydraulic billet sport cams and married to a specially prepared, 1986 915 Euro transaxle gearbox with LSD and euro oil cooler system. This one of kind project is 100% built in-house.                  As you can see the Patrick Motorsports 911 / 930 Roll Bar fits like a champ! Also shown, our...

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Vintage IMSA Race Car Restoration - 1976 934 #173 Al Holbert Car

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Vintage IMSA Race Car Restoration - 1976 934 #173 Al Holbert Car
 Once featured on the cover of Road & Track Magazine and driven by racing legend Al Holbert, this 1976 934 needs some attention. 

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1964 904 Carrera GTS Vintage Race Car Service

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1964 904 Carrera GTS Vintage Race Car Service

    View this post on Instagram Yesterday we spent some time on the Dyno with the fresh 4 Cam engine and exhaust upgrade #patrickmotorsports #porscheracing #porscherestoration #porsche904 #4cam #porsche904gts #drivetastefully #dynotune #dynojet A post shared by PATRICK MOTORSPORTS (@patrickmotorsports) on Jun 13, 2019 at 7:31am PDT   We recently took out both the Porsche 904 Carrera GTS and Porsche Cayman GT4.  Both are high performance light-weight mid-engine sports cars and you can easily see the connection with the two parked next to each other.       The interior of the 904 is spartan to say the least.  No...

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911 Backdate To 911 RSR 3.4L Build in Bright Orange

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911 Backdate To 911 RSR 3.4L Build in Bright Orange

Bright orange, stretched fenders, and a loud exhaust.  Driving down the road, everyone stares.  While on the outside it may look and sound like a racecar, on the inside it feels far from it.  There is still air conditioning and the Recaro seats are both heated and ventilated, a huge luxury in the Arizona heat.    Out on the open road, the steering is darty and eager to turn in.  The vehicle feels taught, with no hesitation on initial turn-in.  Planted through undulations, bump steer is well controlled.  Using the brakes requires a lead foot just like any racecar.  Once proper...

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Zermatt Silver 1984 911 Carrera 3.4L SC RS Tribute Build aka Ice Racer

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Zermatt Silver 1984 911 Carrera 3.4L SC RS Tribute Build aka Ice Racer

Suspension parts used KW V3 Shock Set Front Sway Bar System  Rebuilt Front Control Arms Rear Sway Bar System       Engine Parts 3.4L Pistons & Cylinders  3.4L Badge     The 915 transmission has been regeared to be close ratio for better acceleration.    

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1973 911 RSR 3.8L Twin Turbo MOTEC EFI Upgrade G50 6 Speed Upgrade Conversion

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1973 911 RSR 3.8L Twin Turbo MOTEC EFI Upgrade G50 6 Speed Upgrade Conversion

This special project's goalbwas to back date this 1978 PORSCHE 911 Turbo (930) chassis to the famous 1973 Porsche 911 RSR. This lightweight chassis is fitted with a custom built drivetrain featuring a 993 twin turbocharged 3.8L engine and 6 Speed transaxle. The engine is precisely controlled by a MoTeC M600 engine management system. The transmission is of our special 993 Short Bell Housing, 6 Speed transaxles. Another little addition will be on-board motorsport inspired, KRONTEC air jack system! And of course a fully adjustable brake and suspension system. Take a closer look! Best In Show Award - August 2014 Werks...

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PCA Werks Reunion Winning 914/6 Super GT 3.6L DME Varioram G50 Upgrade Race Car Conversion

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PCA Werks Reunion Winning 914/6 Super GT 3.6L DME Varioram G50 Upgrade Race Car Conversion

  Awarded 1st in Class at PCA Werks Reunion 2017. The 914-6 GT 3.6L Spec Racer fitted with a 1997 3.6L V-Ram engine and one of our Early G50 inverted mid-engine transaxles. Take a look! Won 1st in Class at PCA Werks Reunion 2017 in Monterey, California! The initial body being fitted to the acid dipped 914 chassis The body fit from the rear Here you see the inverted G50 trans mocked up in the rear of the 914/6 chassis The 914 steel targa bar weighs just 19.5 lbs                        ...

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1996 993 RSR EVO II 3.8L MOTEC ITB G50 6 Speed Upgrade Conversion

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1996 993 RSR EVO II 3.8L MOTEC ITB G50 6 Speed Upgrade Conversion

We started with a 1996 993 coupe and completely converted it to full race RSR GT II configuration. We used all EVO II lightweight composite glass body work including the roof skin, and flush mount lightweight LEXAN windows. On the scales we are at 2,360 lbs. We spared no expense or detail on this car. The engine is a 964 based 3.8L RSR, utilizing all the tricks- RSR big valves & seats, Sprint cams, TWM manifold system, hand made full race 1-7/8" stainless steel headers with merge collector & rear crossover secondary merge exit. We are utilizing the very best...

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1985 930 Euro to 935 3.8L Twin Turbo Upgrade Conversion

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1985 930 Euro to 935 3.8L Twin Turbo Upgrade Conversion

1985 930 Euro To 935 3.8L Twin Turbo ConversionBuilt With Mahle Turbo 102mm 3.8L Pistons   964 Based 3.8L twin turbo with gt 2 oil pump & black coated bearings 3.8l twin turbo intercooler & intake fabrication 935 SKID PLATE FABRCATION            

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Riviera Blue 911 RSR Race Car With 964 3.8L G50 5 Speed Race Car Upgrade Conversions

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Riviera Blue 911 RSR Race Car With 964 3.8L G50 5 Speed Race Car Upgrade Conversions

We fit this 911 race car with a 3.8L 964 based RSR engine, and coupled it to a 1989 G50 transaxle. The gearbox has all the tricks, tall 2.8 ratio first gear mainshaft set with close ratio gears straight thru 5th gear. We set the G50 up with a Quaife torque biasing differential and our billet side cover. This is just the start of our project build sheet, see the detail in the photos and read the description of parts & service related to getting it done. These services shown here are performed daily at Patrick Motorsports, and the products we...

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2000 996 GT3R RSR Race Car Service And Upgrades

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2000 996 GT3R RSR Race Car Service And Upgrades

2000 996 GT3R RSR - Porsche Motorsport Werks Reunion The Porsche Motorsport 996 GT3R RSR at Daytona Raceway         2014 WERKS REUNION AWARDS October 2013 Circuit of the Americas, Austin, Texas USA 2013 INDE MOTORSPORTS RANCH 2013 INDE MOTORSPORTS RANCH Race ready at California Festival of Speed 2017 Racing at California Festival of Speed 2017

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Guards Red 1998 993 Carrera S Varioram to 3.8L Euro RS Engine Upgrade Conversion

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Guards Red 1998 993 Carrera S Varioram to 3.8L Euro RS Engine Upgrade Conversion

We have just completed a fully documented conversion of this 1998 Porsche 993 Carrera 2 S to a full Euro 993 RS 3.8L engine. Baseline Dynamometer Testing Results: The stock original 993 3.6L Varioram engine configuration produced 225.75 Ft/lbs Torque and 243.50 Horsepower at the wheels.         Balancing the single mass Euro RS flywheel and clutch assembly. Sachs Race Engineering Sport GT2 Clutch Porsche 993 Euro RS 3.8L Engine Conversion Package. Notice the large valve heads and lightweight magnesium intake manifold base runners! Original Porsche Engineering!     The Porsche Euro RS 3.8L cylinder heads as received. For this project...

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Maritime Blue 1995 993 RSR Speedster 3.8L MOTEC ITB 2WD G64 6 Speed Race Car Conversion Restoration

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Maritime Blue 1995 993 RSR Speedster 3.8L MOTEC ITB 2WD G64 6 Speed Race Car Conversion Restoration

This project started life as a 1995 Porsche 993 Carrera 2 cabriolet. I purchased it as a salvage title interior fire/burn, and parted it out. I always dreamed of a race car, or Crazy C4 Roadster conversion -turbocharged of course, "Pikes Peak" killer. OK, I came to my senses, and here is what we have done. We stripped & sand blasted the tub, seam welded & caged the chassis. We then gave it the Zinc acid etch sealer. We fitted it with the 993 GT2 glass body package, our little twist was the addition of the cab./speedster profile. We have...

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1991 Porsche 964 3.8L RSR Twin Turbo G50 6 Speed Restoration Conversion

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1991 Porsche 964 3.8L RSR Twin Turbo G50 6 Speed Restoration Conversion

  This 964 RSR was built to win with a 3.8L twin-turbo engine, 993 G50 6 Speed, Wavetrac differential and more!  Oil Scavenge Pump and Crankshaft Cam Work                   993 Twin Turbo engine & 6-speed conversionBuilt up to 3.8L with Mahle Pistons & CylindersPauter rods, GT2 Pump, GT2 sport camsHandmade custom 321 SS headers and exhaustTwo K24 turbosTall 1st gear + Short gear stackWavetrac differentialMoTeC C125 Race DisplayTuned MoTeC M600 ECUAll parts used in this build are stocked, distributed,and installed at Patrick Motorsports!

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Light Yellow 1980 911 SC TO 911 RS 3.8L Backdate Restoration Conversion

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Light Yellow 1980 911 SC TO 911 RS 3.8L Backdate Restoration Conversion
This 1980 911 SC to RS is sporting our Mahle Motorsport 3.8L engine package, 915 transaxle, 935 - coilover suspension and 993 Twin Turbo BIG brakes!

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1978 930 Turbo Group B RS / RSR Race Car

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1978 930 Turbo Group B RS / RSR Race Car

This 1978 Porsche 911 Turbo (930) was originally prepared for street use, but has now been converted for export to Europe for racing use in the United Kingdom in a resurrection of the famed Groupe B FIA class.The project features extensive engine tuning. We changed out cams, light head work, valve relief piston tops, huge intercooler, stainless headers, KKK turbo, and a few other little tricks to get a super efficient power band.We race prepped the transaxle with close ratio gears, Quaife differential, and trans. cooling system. We cut the roof to lose the weight & build the FIA spec....

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1974 911 RSR Clone 993 3.6L DME 915 Upgrade Restoration Conversion

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1974 911 RSR Clone 993 3.6L DME 915 Upgrade Restoration Conversion

Starting out life as a 1974 911, this car has transformed into a killer "RSR" street racer. 1996 993 big valve with 1995 DME injection, hydraulic valves, early stainless heat exchangers, RS sport muffler, 993 R-134 A/C compressor for added creature comforts!A 1986 915 transaxle with Limited Slip Differential (LSD) pushes the 3.6L power through late Carrera axles. The car is set up with full 935 type front suspension, RSR 935 coilover strut with dual spring & rear inverted RSR 934 coilover shock with dual spring setup. The 1974 911 chassis converted to 911/930 steel wide body & RSR front...

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Grand Prix White 1974 911 IROC 3.8L Slide Valve MOTEC RUF R50-50 6-Speed Upgrade Conversions

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Grand Prix White 1974 911 IROC 3.8L Slide Valve MOTEC RUF R50-50 6-Speed Upgrade Conversions

Modern 1974 IROC clone, this was started on a Grand Prix White L-908 1974 911, and fitted with a 964 based 3.8L engine. The engine is managed by MoTec and features our new billet EFI "Slide Valve" manifolds! We have fitted the car with a RUF 6 speed gearbox that is based on a G-50/50 transmission. The result was a super lightweight 380 hp street/track monster.               INDE Motorsports Ranch 2014 - Shake down and tuning.   911 RSR Slide Valve Individual Throttle Bodies (ITB) - Twin-Plug Ignition                ...

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1973 911 LHD to RHD 911 RS 993 3.6L Varioram G50 SBH Upgrade Conversions

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1973 911 LHD to RHD 911 RS 993 3.6L Varioram G50 SBH Upgrade Conversions

1973 Porsche 911 RS Retro - Right Hand Drive Conversion               The Porsche G50-01 5 Speed transaxle gear shifter.              

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1973 911T To RSR Build With 993 3.6L Varioram G50 Restoration Conversions

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1973 911T To RSR Build With 993 3.6L Varioram G50 Restoration Conversions

We have started this restoration and modification build with a very clean 1973 911T showing 90,000 miles on the odometer. It’s a car that I bought without the original 2.4L mechanical Fuel injection engine, although it did still have the original 915 transmission with 7:31 ring and pinion hanging in there. The car was so clean & complete I had thought about putting a 2.4L MFI engine back in, wait this thought only crossed my mind for a moment. I had true visions of grandeur in 1973 RSR style with a 1996-1998 993 3.6L DME V-Ram engine featuring A/C and Heat,...

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1973 911 RSR Racer With 3.8L DME G50 6 Speed Conversions In Martini Livery

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1973 911 RSR Racer With 3.8L DME G50 6 Speed Conversions In Martini Livery

This 911  underwent a complete rebuild to RSR specification. We incorporated a 6-speed G50 Short Bell Housing transmission (G50 SBH). We machined and performed a blueprint rebuild here at Patrick Motorsports. Engine and Transmission fitment required extensive chassis modifications due to the longer transmission length. The engine displacement has been increased to 3.8L. Oil cooling has been updated with an RSR oil pump, our special Setrab front mount oil cooler and the original equipment 930 radiator style front fender cooler. The specs for the racing class allowed us to use PMO Carburetors with a high output ignition system. We also built...

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1973 911 RS Restoration In Metallic Green

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1973 911 RS Restoration In Metallic Green

Porsche 911 RS - Full restoration   Featured Parts With Store Links 911 RS Style Stainless Steel Sport Muffler For Early 911 / 914-6 - Dual Inlets and Outlets (EXH 911 RS SM SS PMS - LINK)  Featured Parts With Store Link:1973 Porsche 911 RS Front Bumper With Oil Cooler Cutout (BOD 911 RS FB - Link)1973 Porsche 911 RS Rear Bumper (BOD 911 RS RB - Link)1973 Porsche 911 RS Ducktail Rear Spoiler (BOD 911 73 RS DBS - Link)  Metallic Green Color Matched Smuggler's Box Door   911 RS Engine Before Flywheel And Clutch Package Installation  Featured Parts...

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1973 911 RS Pro Touring With A 993 3.6L DME And G50 SBH Conversions

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1973 911 RS Pro Touring With A 993 3.6L DME And G50 SBH Conversions

We restored and converted this 1970 911 into a RS "PRO" Touring edition! Our customer's 911 will be powered by a 1995 993 3.6L DME fuel injected engine. Power is executed through our G50 5 speed Short Bell Housing transaxle. It features a full stainless steel exhaust with heat and A/C air-conditioning with R-134 refrigerant.   Here our 1995 993 3.6L and G-50 Short Bell Housing trans. w- billet side cover are ready for installation Our 993 A/C condenser upgrade to the 1970 911.Note the A/C receiver drier with over pressure switch.  This switch keeps you from blowing up the...

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1972 911 RS 993 3.6L DME G50 SBH Transmission Conversion Restoration

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1972 911 RS 993 3.6L DME G50 SBH Transmission Conversion Restoration

This 1972 911 was a wreck when it showed up on a trailer towed in from San Diego. The customer wanted to have a car with super performance, and the comfort of A/C. The 1995 Porsche 993 3.6L engine was selected for installation in this project car.To fit this engine in this older Porsche 911 chassis, several modifications are required, the dash and power brake sheet metal work was the most intensive (see detail in photos). We have installed the wide variety of our special 3.6L DME engine conversion parts. For this project we installed the Porsche G50  transmission converted...

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