Originally Posted by turbo-fast 
Engine is on my car! ДолгоÑтрой Gti-R Time attack I have made photos of pistons by my usb endoscope camera
Do I need to make bores in cp pistons for valves??? P12 head cams have bigger cams lifts!
The valves will hit these pistons if you run P12 cams. I would not even start the engine with your combination because they will probably make contact as soon as VVL engages.
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