ARP 750-3250 SAE Bolt Kit 1/4-28 x 3.250 hex black oxide bolts ymm_47 using a Porsche 718 Cayman

using a Porsche 718 Cayman GT4 with a stock exhaust system for comparison

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

750˝ Thread Diameter-Pitch 1/2-20 Grip Diameter 1/2˝ Wrenching 9/16˝ Head Height 0

750˝ Thread Size M10 x 1

Specifications Socket Size(s) 19mm 12pt UHL 4

ARP 750-3250 SAE Bolt Kit 1/4-28 x 3.250 hex black oxide bolts ymm_47 using a Porsche 718 CaymanSpecifications Socket Size(s) 5 16 hex UHL 3. 250 Thread Length 1. 000 Grip Length 2. 250 Thread Diameter Pitch 1 4 28 Grip Diameter 1 4 Wrenching 5 16 Head Height 0. 255 Collar Diameter 0. 515