Stage 8 Locking Header Bolt Kit - 6pt. 8mm-1.25 x 25mm (16) PTT-CS-3-QD Both will fit Small Block

Both will fit Small Block Chevy engines without modifications and Big Block Mark IV Chevy engines with minor block modifications

Stainless steel hardware is included

3-Position

1957-1958 Pontiac Super Chief

Fast response

Stage 8 Locking Header Bolt Kit - 6pt. 8mm-1.25 x 25mm (16) PTT-CS-3-QD Both will fit Small BlockProduct Description: Header Bolt Locking 8 mm x 1. 25 Thread 25 mm Long Hex Head Steel Nickel Plated Ford Modular 2005 15 Set of 16 Stage 8 Locking Fasteners has provided Fail Safe Joint Integrity For Critical Applications over 22 years. Stage 8 Locking Fasteners are available in kits, ready to install on all critical automotive parts like headers, starters or turbos. Stage 8 Locking Fasteners easily install on all popular makes and models and are