ARP 4503501 Starter Bolt Kit, Stainless Steel With 12-Point Heads, For Select Ford Applications Simplifies starter motor installation in the cramped confines of a race car Features small diameter head and standard shank knurling; 1.500 under head length Manufactured from 100% maintenance free ARP 300 stainless steel Rated at 170,000 psi, which is stronger than Grade 8 hardware Designed for select Ford applications, 2 bolt, 12-point