ARP 623-4000 SAE Bolt Kit 3/8-16 x 4.000 hex SS bolts ymm_20 The change in performance is

The change in performance is a noticeable factor when compared to the stock exhaust system configuration

It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants

Carbon fibre tailpipes with precision finish

which is ideal for everyday use

These fasteners deliver superior strength and meet the ARP “ZERO defect – ZERO failure” quality standard

ARP 623-4000 SAE Bolt Kit 3/8-16 x 4.000 hex SS bolts ymm_20 The change in performance isSpecifications Socket Size(s) 3 8 hex UHL 4. 000 Thread Length 1. 000 Grip Length 3. 000 Thread Diameter Pitch 3 8 16 Grip Diameter 3 8 Wrenching (reduced) 3 8 Head Height (reduced) 0. 300 Collar Diameter (reduced) 0. 620