k64spec headgaskets + cutrings system.

orings/cutrings are the best method for the largest boost. 

Forged full water and oil canals. 

We guarantee boost for over 2 bars. 

For use only with ARP M10 / M11 pins.

Set Under each bore type: 84mm 84.5mm 85mm 85.5mm 

For M50 / M52 engines (vanos and singlevanos). Welcome!

simply place the cutring on the engine block. No intervention in the engine block.

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