2001–2016 Duramax 6.6L High-Flow Race Exhaust Manifold Kit
Improve flow • Reduce backpressure • Increase performance
Upgrade your 6.6L Duramax with our high-flow race exhaust manifold system, designed to replace the restrictive factory manifolds found on 2001–2016 trucks. This setup improves exhaust flow, lowers EGTs, and supports higher horsepower builds — whether you’re towing, daily driving, or running a full performance setup.
High-Flow Race Manifolds (Base Kit)
Our high-flow manifolds are engineered for maximum exhaust flow and durability. The base kit includes:
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High-flow cast manifolds
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Required manifold bolts (Allen-style)
- Gaskets
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Direct bolt-on fit for 2001–2016 Duramax trucks
Perfect for customers who already have upgraded hardware or want a simple bolt-on replacement.
Installer Kit (Highly Recommended)
Upgrade to the Installer Kit for the strongest and cleanest install possible. This kit includes:
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Stainless steel manifold studs
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12-point stainless nuts for superior clamping force
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New up-pipe to manifold bolts
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Corrosion-resistant hardware designed not to rust
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Stud-style manifold mounting for better sealing and easier maintenance
This kit replaces the standard Allen bolts with stainless studs that thread into the cylinder head, giving you a longer-lasting and more secure manifold installation.
Optional: Brand New Up-Pipes (Driver & Passenger Side)
For customers wanting a full fresh setup, you can also option:
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New passenger-side up-pipe
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New driver-side up-pipe
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Fully compatible with both the base manifold kit and Installer Kit
A great choice for trucks with higher mileage or trucks already apart for other upgrades.
Why Choose This Kit?
Increased exhaust flow
Lower EGTs
Better turbo response
Optional stainless hardware that won’t rust
Direct fit for all 2001–2016 6.6L Duramax engines
Perfect for stock, tuned, or fully-built setups