Forged Piston & Rod Set 8.5:1 CR

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Wössner forged piston & steel PEC rod SET 

Gives 8.5:1 Compression ratio same as Focus RS mk2 

With piston rings 

With ARP Con rod bolts 

With gudgeon pins 

Pistons feature a unique PTFE coating on skirts and pistons are are 4032 Alloy with polished crowns 

Often used in XR5 engines to drop CR to a much safer level when running upgraded turbochargers