964 - 993 RS - RSR 3.8 liter piston and cylinder 11.8 : 1 engine 109 mm Porsche 911

964 - 993 RS - RSR 3.8 liter piston and cylinder compression: 11.8 : 1 engine 109 mm Porsche 911
for narrow connecting rod.

Naturally aspirated engine - sport and racing pistons. An upgrade for the Porsche 964 - 993 3.6 liter engine.
Barrel size 109 mm ( spindle to 109 mm is required )

Attention: The higher piston head weights can lead to marginal rattling noises at idle
This is because the pistons are designed to close the valve pockets on camshafts
to be able to enlarge with a larger stroke.