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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram

Motor Sport Parts

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CMS.993.EC
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This conversion was originally designed for mid-engine installations using an AWD 6 speed transmission - but can also be used in rear engine applications.

The end plate is available in two versions, 5 speed G50 or 6 speed 993 and with or without a provision for the shift shaft. This conversion requires either the c4 5 speed or c4 6 speed gear housing to be used in conjunction.

This can be useful for 6 speed AWD to 2 wheel drive conversions, or to replace the no longer available 6 speed 2WD gear housing.

Note: Please specify whether you want with or without shift shaft provision when ordering. The price is the same regardless.

Compatible with housing 964.301.915.05 or 964.301.103.07 from G64/00, G64/01, G64/20, G64/21, G64/51, G64/52
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9XXGFIX
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It's not uncommon for one or both bosses that capture the pivot shaft for clutch release fork to crack or break off rendering your clutch inoperable. This is a repair kit and will require some machine work and a strip and rebuild to professionally repair your bell housing for a fraction of what it costs to replace the housing or the entire transmission. 993 bell housings remain no longer available.

Our current version uses hardware to reattach the new bosses rather than welding making future replacement much easier. This is the cleanest repair in the industry.

Uses the current version pivot shaft and fork assembly.

rohler

For all G50, G64, 993, 996T/997T, 996/997 GT2/GT3 transmissions.

G50, G50/00, G50/01, G50/50, G50/03, G50/04, G50/05, G50/52, G64/00, G64/01, G50/20, G50/21, G50/31, G50/32, G50/33, G64/51, G64/52, G96/50, G96/88, G96/90, G96/92, G96/96, G96/97, G95/50, G97/88, G97/96

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9XXGFIX
95011608606
99711608690
CMS.G50.TOBR

The product you are viewing cross references to these numbers
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95030311101/1
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The weakest and most commonly broken shift fork in the G50 5 speed transaxle is the cast aluminium 1st/2nd shift fork.
Our newly designed fork is CNC machined beautifully from aircraft grade billet aluminium 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.

Fits all G50 5 speed Porsche transmissions '87-'94.
(G50/00, G50/01, G50/50, G50/03, G50/04, G50/05, G50/52, G64/00, G64/01)

Replaces part 95030311101

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95030311101
95030311101
950.303.111.01

The product you are viewing cross references to these numbers
95030311304/1
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The factory cast aluminum 993 fork suffers from an inherent weakness in which the steel insert that the reverse lever actuates - is prone to failure.
The cast steel RS fork does not have this issue but it's not a billet steel one like ours...and it's less expensive.

Fits all G50 5 speed transmissions '87-'94 and all G50 6 speed transmissions '95-'98 including C4, RS, Turbo and RSR models.

(G50/00, G50/01, G50/50, G50/03, G50/04, G50/05, G50/52, G64/00, G64/01, G50/20, G50/21, G50/31, G50/31, G50/33, G64/51, G64/52)

Replaces part 950.303.113.04, 950.303.103.00, 950.303.113.04, 950.303.103.06

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95030311304
95030311304
950.303.113.04

The product you are viewing cross references to these numbers
DISPLAYING 1 to 4 (of 4 products)
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About Motor Sport Parts

Porsche Gearbox Motorsport Parts | Precision Components for Track-Ready Performance

Motorsport gearbox parts are engineered to deliver the precision, strength, and durability demanded by high-performance and racing environments. Designed to withstand extreme torque, heat, and rapid gear changes, these components optimise power delivery and shifting accuracy under competition conditions.

At Design911, we supply race-proven gearbox motorsport parts that meet or exceed high-performance engineering standards. Our range includes upgraded gears, bearings, selector forks, differential components, cooling systems, and reinforced casings — all precision-machined for endurance, reliability, and efficiency.

Whether you’re preparing your Porsche for competitive motorsport, endurance racing, or high-performance track use, our gearbox motorsport components provide superior response, strength, and reliability lap after lap.

What Do Motorsport Gearbox Parts Do?

Motorsport gearbox components enhance the transmission’s ability to handle increased power and aggressive driving while maintaining smooth, rapid gear engagement.

Core Functions:

  • Strengthen the drivetrain for high-torque and high-RPM use.
  • Improve gear shift speed, precision, and durability.
  • Optimise cooling and oil flow for prolonged performance.
  • Reduce friction and heat build-up under extreme load.
  • Provide improved reliability in racing and endurance conditions.

These upgrades are essential for performance-tuned Porsches that experience higher stresses than standard road use can withstand.

Why Do Standard Gearbox Components Fail in Motorsport Conditions?

Under high stress, standard gearbox parts can quickly reach their performance limits. Motorsport use exposes them to extreme conditions that accelerate wear and mechanical fatigue.

Common Causes of Failure Include:

  • Excessive heat from extended high-RPM driving.
  • Gear tooth wear or chipping under racing torque loads.
  • Oil starvation during hard cornering or acceleration.
  • Bearing fatigue due to extreme lateral and axial forces.
  • Deformation or cracking of casings from repeated stress cycles.

When standard parts are pushed beyond their design limits, they can cause shifting issues, noise, leaks, or even catastrophic gearbox failure.

Why Replace or Upgrade to Motorsport Gearbox Parts?

Upgrading to motorsport-grade gearbox components enhances performance, durability, and responsiveness — ensuring your Porsche performs flawlessly in competitive conditions.

Key Benefits:

  • Superior strength for high-power applications.
  • Enhanced cooling and lubrication for sustained performance.
  • Faster, smoother, and more precise shifting under load.
  • Increased longevity and reliability in race conditions.
  • Available for Porsche 911, Cayman, Boxster, GT3, and Cup models.
  • Perfect for performance builds, track conversions, and endurance racing.

Motorsport gearbox parts are not only replacements — they are precision upgrades that deliver consistent, race-winning reliability and performance.

Highlights

  • Motorsport-grade Porsche gearbox components.
  • Engineered for strength, precision, and endurance.
  • Ideal for road-to-track conversions or full competition use.
  • Designed for optimal oil flow, thermal stability, and torque handling.
  • Includes reinforced gears, shafts, bearings, and cooling components.
  • Proven reliability in motorsport and performance environments.       

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