GM LS Cast Iron Exhaust Manifolds w/2.5in Outlet 2018-bmw-330i-esi1268581 This produces lower air intake

This produces lower air intake temperatures which results in added horsepower and the ability to add more timing advance with less detonation

0 - Electric - In-Line - 1850 lb/hr at 9 psi - 12 AN Female O-Ring Inlet - 10 AN Female O-Ring Outlet - Black - E85 / Gas - Each

BBK Performance full length long tube exhaust headers offer unsurpassed quality and fitment using top quality materials and American craftsmanship

2A/5 - Multi-Layer - Aramid / Fire Retardant Cotton - Black - Medium - Each

Main Bearing - H-Series - Standard - Extra Oil Clearance - Big Block Chevy - Kit

GM LS Cast Iron Exhaust Manifolds w/2.5in Outlet 2018-bmw-330i-esi1268581 This produces lower air intakeExhaust Manifold LS Cast Iron 2. 5 in Outlet Ductile Iron Silver Ceramic GM LS Series Pair