Motor Sport Parts

Fits all Porsche 901/911/912 aluminum case 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

Replaces part 901.301.251.01 tensioning plate

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Related, superseded, cross reference or alternative numbers for comparison.

90130125101

The product you are viewing cross references to these numbers

At last, a strengthened side plate for the early aluminium case 901 transmissions! Fits all vintage Porsche 911 and 912 short wheel base cars '65-'68 some early '69 models with "chilled casting".

Precision machined from aircraft grade billet aluminium to exacting standards for perfect fit and function
Oil passageway for standard taper roller bearing
Replaceable clutch cable bracket
Uses rubber o-ring instead of paper gasket (part 113.301.185a included)
Uses standard differential taper roller bearing 999.059.027.00

Note: The cover is thicker than the original and therefore requires longer studs to be installed. We include a new set.

Replaces part 901.301.311.01

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Related, superseded, cross reference or alternative numbers for comparison.

90130131101

The product you are viewing cross references to these numbers

Replacing part for 911.301.221.00 (no longer available). Made in house from billet 6061 to correct tolerances.

Genuine Porsche bearings are recommended

Fits 911/912 64-69.5 aluminium case 901 transmissions.

90130122100, 901-301-221-00

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Related, superseded, cross reference or alternative numbers for comparison.

90130122100

The product you are viewing cross references to these numbers