ARP 640-4500 SAE Bolt Kit 1/4-20 x 4.500 12pt black oxide bolts ymm_40 ARP Stainless

ARP Stainless

The system is designed to deliver improved throttle response and subtle performance gains

Full titanium construction with cast titanium valve housings and collectors

providing superior strength and reliability compared to standard OEM fasteners

when installed with an Akrapovič Slip-On Line (Titanium) and tested on the Akrapovič dyno against a Corvette Stingray with a stock sport exhaust system

ARP 640-4500 SAE Bolt Kit 1/4-20 x 4.500 12pt black oxide bolts ymm_40 ARP StainlessSpecifications Socket Size(s) 5 16 12pt UHL 4. 500 Thread Length 1. 000 Grip Length 3. 500 Thread Diameter Pitch 1 4 20 Grip Diameter 1 4 Wrenching 5 16 Head Height 0. 255 Collar Diameter 0. 515