New:

  • 901/911 Transmission Mounts
  • Raised Tunnel Shift Tower
  • Straight Shift Lever
  • CMS Products (California Motorsports)
Rebel S Racing (RSR Products) Semi-Solid Engine / Trans Mounts

Fits:  Engine mounts on 65-89 911, all 930
915 and G50 Transmission mounts on 72-89 911, 912E

Semi-solid engine mounts are the perfect compromise between stock rubber and solid mounts.  The rigid
polyurethane construction makes them ideal for performance oriented cars but still allows absorption of harmful
vibrations and noise associated with solid mounts. Installs in stock motor mount hangers replacing worn out factory
rubber.  These also replace Transmission mounts on 915 and G50 equipped cars.  Black mounts are 10% more
rigid than OEM, the Blue "Sport" mounts are 30% more rigid than the black mounts (40% more than stock).  Sold as
a complete set for engine or transmission applications.
$89.00
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Rebel S Racing (RSR Products) Performance Engine / Transmission Mounts

Replaces Engine mounts on 65-89 911, all 930  (2 required per car)
Replaces 915 Transmission mounts on 72-86 911, 912E, all 914*   (2 required per car)

Features all the benefits of the semi-solid mounts listed above but also includes heavy duty aluminum housing and
superior quality Poly-Urethane inserts.  CNC machined from billet 6061 T-6 and anodized our signature grey for
great protection.  Simple and easy installation.  Sold individually.
*For 914 applications the 2 mounting holes must be slightly elongated prior to installation.
Pictured on car
-click here-
$85.00
Rebel S Racing (RSR Products) 901/911 Semi-Solid Transmission Mounts

Replaces 901 and 911 transmission mounts on 65-71 911/912

Manufactured from modern high performance and high temperature polyurethane.  Black mounts are
OEM hardness, Blue "Sport" mounts are 30% more rigid than the black or stock rubber mounts.  These
vibrations and noise associated with solid mounts. Greatly improves the shifting qualities of your car.
These are an excellent OEM replacement.  Installs in stock transmission mount hanger (not included)
replacing worn out and cracked factory rubber mounts.  
Sold in pairs.  Kit Completes one car.
Installed in stock
transmission hanger
$119.00 Select
Transmission & Shifting
Porsche Factory 915 Short Shift Kit, fits all 915 gearbox (72-86)

Known as the M241 option, shortening the shift lever throw by 35%.  This is a great upgrade for street and
track cars as it allows quicker and more precise shifts.  The reduction in throw also allows for additional
seat room and adjustment.  The optional smooth shift bushing kit will replace all 4 of the linkage bushings,
which are commonly worn out and causing a crude and unpredictable selection of gears.
Add
$190.00
RSR Raised Tunnel Shift Tower
Professionally fabricated center tunnel re-positions any stock shifter or Rennshifter by raising it 4 inches and
moving it back 4 inches.  This brings the shifter to an ideal location close to the steering wheel, minimizing hand
movement and reach for all gear selections.  The tower includes all fastening hardware, weld on blind nuts, and
a provision to relocate the parking brake if desired.  A straight shift lever is recommended when using this tower,
you can bend a stock lever straight or purchase one of our machined billet levers.  We can say with confidence
that this setup provides the best shifting experience you have ever thought possible from a 65-89 chassis.
*Note that the stock tunnel must have a 1.5 inch wide by 7 inch long slot cut into it from the rear coupler opening
extending forward allowing for shift linkage rod clearance.     
$300.00
$75.00
Rebel S Racing (RSR Products) Straight Shift Lever

Fits: Rennshift for 901,915, G50.  Also works with factory shifters

Designed for shift housings that have been moved back (like the RSR) or installed onto the RSR raised
tunnel shift tower offered below.  This straight lever puts the shift knob as close to the steering wheel as
possible after the shift housing has been moved back by 4 inches.  Accepts all factory Porsche or Rennshift
knobs with crush sleeve or internal threads.  Precision machined from billet 6061 and anodized gray.
Stomski Precision Shift Coupler
$200.00
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$550.00
Rennshift for 901, 911, and 915 Gearboxes

Fits: 911 up to '86, 914 '70-'72 with tail-shift transmission (including 914-6)

Features two options of adjustable throw, adjustable spring gates, bronze bushings, and a factory style
"curved shaped" reverse lockout that guides the lever properly around the reverse gear selection
Complete shifter makes installation simple, no need to reuse any stock components
Works with factory shift knob or most aftermarket shift knobs
Includes small RS boot.  Can be used with original factory 915 bellows boot
$325.00
Rennshift for G50 Gearbox

Fits: 911 '87-'89

Provides a 25% throw reduction while maintaining the stock shift knob height.  Tighter tolerances than the
original shifter for precise shifting.  Lightweight aluminum machined parts with a rigid steel stick.  New shift
rod bushing and pivot o-rings are included.
$329.00
CMS 901 Billet Side Cover

At last, a strengthened side plate for the early aluminum case transmissions!  Fits all vintage Porsche 911 and 912
short wheel base cars 65-68 (some early 69).  With the ever so increasing power of today’s race engines and the
stick of today’s tires you are starting to put some serious stress on your original cast side cover, especially under
track conditions.  As the side cover acts as a thrust plate, under load there can be a tremendous force applied to it,
and it can break sometimes causing damage the ring and pinion-or worse.

Upgrading to a billet side plate will add significant strength and reliability to the differential section
  • Precision machined from aircraft grade billet aluminum to exacting standards for perfect fit and function
  • Oil passageway for standard taper roller bearing
  • Removable billet clutch cable bracket
  • Uses rubber o-ring instead of paper gasket (part 113.301.185a)
*Note: The cover is thicker than the original and therefore requires longer studs to be installed which are INCLUDED!
$329.00
CMS 911 / 914 Billet Side Cover

We offer a new generation of heavy duty and lightweight billet side cover for your late 901 or 914 transaxle. It will
add a fair amount of strength to your diff section and is just plain sexy!
Our design features include:
  • A diff bearing oiling provision
  • Uses large 930 turbo diff bearing (999.059.064.00)
  • Removable clutch cable holder can accommodate push clutch (’69 911 only) or pull clutch (’70-’71 911)
*Fits all Porsche 901/911 69-71 and 914 70-76 magnesium case transmissions
$348.00
CMS 915 Billet Side Cover

  • Precision machined from billet 6061
  • Superior in strength as compared to all OEM side plates
  • Uses larger 930 Turbo differential taper bearing (999.059.064.00)
  • Oil passageway for additional lubrication to the diff bearing
  • Perfect fit/no clearance issues
  • Adds strength and reliability to the diff section
  • Perfect for racing and V8 applications
  • Fits all 915 transmissions 72-86
$499.00
CMS 930 Billet Side Cover

The original 930 differential side cover is made of cast aluminum, not to mention it’s pretty thin.  Under load there
can be a tremendous force applied to this cover, and it can break, sometimes resulting in a damaged ring and
pinion-or worse.  Upgrading to a billet side plate will add significant strength and increased reliability to the
differential section.
Our design features include:
  • A ring gear thrust bolt to reduce ring gear deflection under load
  • Ports that can be used for an oil cooling system
  • Cross drilled oil passageways for the diff bearing.  Works both upright and inverted!
$425.00
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CMS G50 Billet Side Cover

The original differential side cover is made of cast aluminum.  Under load there can be a tremendous force applied
to this cover, and it can break, sometimes resulting in a damaged ring and pinion-or worse.

Upgrading to a billet side plate will add strength and increased reliability to the differential section.

Our design features include:
  • A provision for the OEM speed sensor for early models
  • An oil passageway for diff bearing
  • Uses the standard taper bearing, radial seal and O-ring
  • The turbo version further incorporates a thrust screw to reduce ring gear deflection under load

PRICING:
G50 billet side plate for 87-89 911 $425
Part number CMS.G50.BSP
G50 billet side plate for 90-94 964 C2 and 993 95-98 $425
Part number CMS.993.BSP
G50/52 billet side plate for 91-94 965 C2 Turbo $499
Part number CMS.GT3.BSP
$399.00
CMS 911 Billet Intermediate Plate

The factory cast magnesium intermediate plate is known to be problematic.  Original ones tend to crack, have loose
or out of round bearing bores or may have worn out shift shaft provisions.  Perfect for street, race, higher
horsepower and V8 applications-where the additional strength is really needed!
  • Precision machined from aircraft grade billet aluminum to exacting standards for perfect fit and function
  • Replaceable silicone bronze shift rail bushings
  • Input shaft bearing oilier
  • Lightest weight possible, only 4.25 lbs
  • Fits all Porsche 901/911 69-71 and 914 70-76 magnesium case transmissions.
$189.00
CMS 911 Billet Bearing Retainer

Fits all Porsche magnesium case 901/911 69-71 and 914 70-76  transmissions
  • Precision machined from 4130 Chromoly
  • Better supports both main and pinion shaft bearings
  • Improved design captures the main shaft bearing 45% more than OEM
  • Substantial clearance provided for even non-standard tall 1st gear ratios
  • Perfect fit for bearings and assembly
  • Much stronger than the original cast part
  • Note:  Deletes shim underneath original retainer if applicable

Note:  Deletes shim underneath original retainer if applicable
$199.00
CMS 915 Billet Bearing Retainer

Fits all Porsche 911/915 transmissions 72-86, including ’76 912E
  • Precision machined from 4130 Chromoly
  • Better supports both main and pinion shaft bearings
  • Improved design incorporates an oil groove promoting more lubrication to the input shaft bearings
  • Substantial clearances for ease of assembly
  • Perfect fit for bearings and assembly
  • Much stronger than the original cast two piece design
  • Hardware included!
$199.00
CMS 930 Billet Bearing Retainer

Fits all Porsche 930 4 speed transmissions
  • Precision machined from 4130 Chromoly
  • Improved design incorporates an oil groove promoting more lubrication to the input shaft bearings
  • Substantial clearances for ease of assembly
  • Perfect fit for bearings and assembly with correct preload
  • Much stronger than the original cast design
$299.00
CMS 915 Fork Cover Plate

Our newly released billet fork cover plate will allow you to scavenge oil without having to drill, tap or weld to the
case.  Within the oil passageway is a temp sender provision that is usable even when not utilizing the scavenge port.

Features:
  • Proper knock off tabs/pry points for easy removal
  • 300F temp sender included
  • -8AN oil scavenge port (-8AN adapter included)
  • Uses your existing fork, fork studs and dowel pins
  • Uses stock paper gasket
$235.00
CMS G50 Oil Pickup Adapter

Allows you to scavenge oil from the side of a G50 5 or 6 speed transmission bell housing using the factory “blank”
in the casting.  While some models are machined from the factory, most will need additional machine work.  This is a
great solution for a G50 car with low ground clearance that needs an oil cooler.

  • Machined in house from 6061 billet aluminum
  • Nicely beveled edges; high attention to detail
  • VDO 300F temp sender included
  • -8AN adapter included
  • Mounting hardware included
  • For all G50’s ‘87-‘98 except C4 5 speed
  • Not for inverted/mid engine gearboxes
$595.00
CMS 915 Internal Spray Bar

  • Custom made beautifully out of stainless
  • Excellent reproduction of the RSR spray bar
  • Allows for gear lube to be returned to critical areas of the gearbox during extreme conditions (requires pump)
  • Promotes longer synchro, bearing and gear life
$65.00
CMS 915 Ring Gear Spacer

This 2mm spacer ring allows for a much easier setup when retrofitting some differentials and or ring and pinions
within the 915 family.
$375.00
CMS G50 1st/2nd Billet Shift Fork

The weakest and most commonly broken shift fork in the G50 5 speed transaxle is the cast aluminum 1st/2nd shift
fork.  Our newly designed fork is CNC machined beautifully from aircraft grade billet aluminum and offers the most
strength over any fork in the aftermarket.  Our fork will also promote enhanced lubrication to 2nd gear as it better
captures the idler gear when engaged.  Designed, manufactured and fit tested in house.
Fits all G50 5 speed transaxles 87-94.
Wavetrac Torque Biasing Differentials

• Innovative:  Patented Wavetrac® design automatically improves grip in low traction conditions. This feature is truly
innovative and unlike any other torque biasing diff design.
• Superior Materials:  9310 steel gears run in case-hardened billet or forged steel bodies. ARP® fasteners used
throughout.
• Maintenance Free:  As supplied new, the Wavetrac® differential will perform a lifetime of service without
maintenance or rebuilds.
• Customizable:  If desired, you can alter the diff’s behavior to suit your needs using optional components.
• Limited LIFETIME Warranty:  All Wavetrac® differentials include a transferable, Limited Lifetime Warranty.
$1,295.00 Select