Saab B204/B234, B205/B235 head stud kit washer upgrade.
M12 Ten 10-piece .995” O.D. washer set.
ARP “Cat Paw” aluminum cylinder head washers.
ARP has specifically developed this new take on their washer for use on aluminum cylinder heads. The knurled surface prevents the washer from slipping on the aluminum cylinder head after heat cycles to reduce the occurrence of torque loss at the fastener.