Big Hoss Racing Exhaust Manifold by Banks. If you are a racer and have a LBZ-LML 6.6L Duramax, Gale Banks Engineering offers The best cast Duramax manifold ever. Lay the power down with Banks Big Hoss Duramax Exhaust Manifolds!

For high performance, getting the exhaust gasses out of an engine is just as important as getting air into it. These race ready, high-flow manifolds were designed by Banks for the ultimate in fit and performance.

Features:

• Designed and perfected in computer simulations for maximum drive pressure
• CNC ported to fit aftermarket big port heads
• 1.77" x 1.58" Race Ported Inlet Ports
• 2.125" Race Ported Outlet Port
• Outlet Flanges sized for 2.25" .06 wall tubing
• Outlet Bolts M10x1.5 (not included)
• Banks' Precision Port Alignment System allows the manifold to expand & contract without shrouding ports
• Can be mounted stock position or reversed towards the front
• Proprietary bolt pattern on outlets for ease of bolt installation, includes gaskets
• High silicon moly for extreme temps
• We recommend using ARP 762-1008 SS Hex M10x1.5 fasteners to the head (not included)