Sport Camshaft GT/R Left – Porsche 911T 2.2 / 2.4 / 2.7 12V (PR.28540)

Improve the performance of your classic Porsche 911T engine with a GT/R sport camshaft designed for the left side of the engine. This camshaft is intended for Porsche 2.2, 2.4 and 2.7 12V engines, especially in performance-oriented restoration and tuning projects where improved gas exchange, better cylinder filling and a more responsive engine character are essential.

The GT/R camshaft profile provides increased intake and exhaust cam lift compared to the factory specification, along with extended valve opening duration. This supports more efficient engine breathing across the RPM range, helping to improve throttle response, power delivery and overall performance potential while maintaining compatibility with the original valve clearance setup.

Technical Data:
Make and model: Porsche 911T 1969–71 2.2 / 2.4 / 2.7 12V
Type: Sport GT/R
Camshaft type: GT/R – left
SKU / Catalog number of this camshaft: PR.28540

All camshaft SKUs:
Left: PR.28540 / Right: PR.28550

Additional information:
Supported on 3 bearings

Cam lift: Intake: 7.65 mm / Exhaust: 7.35 mm (stock: 6.78 mm / 6.02 mm)
Total duration: Intake: 290° / Exhaust: 282° (stock: 273° / 270°)
Duration at 2.0 mm: Intake: 231° / Exhaust: 227° (stock: 216° / 204°)
Valve clearance: stock

Application:
Porsche 2.2 / 2.4 / 2.7 12V
Porsche 911T 1969–71

A dedicated tuning solution for classic Porsche engines, offering improved response, increased performance potential and a clearly sportier engine character.