SBC Crossover Headers 1- 1/2in-1-5/8in Crate 2007-gmc-sierra-2500-hd-esi3454831 Fitting - Adapter - Straight

Fitting - Adapter - Straight - 10 AN Female Swivel to 1/2 in NPT Male - Aluminum - Black Anodized - Each

Exhaust System - Street Series - Cat-Back - Dual Rear Exit - 2

Fitting - Hose End - AQP/Startlite - 45 Degree - 8 AN Hose to 8 AN Female Swivel - Aluminum - Black Anodized - Each

Valve Spring - RAD-9000 - Dual Spring / Damper - 510 lb/in Spring Rate - 1

Coil Spring - Gold Series - Conventional - 5 in OD - 8 in Length - 275 lb/in Spring Rate - Rear - Steel - Gold Powder Coat - Each

SBC Crossover Headers 1- 1/2in-1-5/8in Crate 2007-gmc-sierra-2500-hd-esi3454831 Fitting - Adapter - StraightHeaders Conventional Crossover 1. 5 to 1. 625 in Primary 3 in Collector Gaskets Hardware Included Steel Black Paint Small Block Chevy Pair