ARP 721-3500 SAE Bolt Kit 1/4-28 x 3.500 hex SS bolts ymm_18 the system delivers additional weight

the system delivers additional weight reduction and measurable performance gains compared to the stock configuration

Impala 2006-2009

Handcrafted titanium headers incorporate 100 cpsi sports catalytic convertors and side mufflers—all designed to increase power and torque—the Evolution Header Set utilizes integrated catalytic convertors and the functionality of the exhaust valves to deliver an out-and-out attack on the senses

Specifications Socket Size(s) 7/16 12pt UHL 0

ARP 721-3500 SAE Bolt Kit 1/4-28 x 3.500 hex SS bolts ymm_18 the system delivers additional weightSpecifications Socket Size(s) 5 16 hex UHL 3. 500 Thread Length 1. 000 Grip Length 2. 500 Thread Diameter Pitch 1 4 28 Grip Diameter 1 4 Wrenching 5 16 Head Height 0. 255 Collar Diameter 0. 515