Part of the Banks Racing line. The best purpose-built cast exhaust manifolds created for racing the Duramax engine. Provides tremendous flow and uniform air distribution.

If you are a racer and have an 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.

For use at sanctioned race events only

Key Features

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