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
Replaces part 901.301.035.13
 
Aluminum case transmissions from 65-68 will need the Early 901 version, replaces factory part 901.301.251.01