Direct bolt-on 304 stainless steel up-pipes for 6.6L Duramax engines (LB7/LLY/LBZ/LMM/LML). OEM-length left/right pipes with free-flowing stainless inner-liner bellows reduce exhaust backpressure, improve turbo response, and lower exhaust temperatures.
Fitment
- 2001–2016 Duramax 6.6L: LB7, LLY, LBZ, LMM, LML
Contents
- 4 stainless gaskets
- 12 x 12.9 grade bolts & washers
Key Features
- Material: 304 stainless steel, 11‑gauge (.120" wall)
- Diameter: 2.00" OD up-pipes
- Flow: ~50% more flow over stock; significant reduction in exhaust backpressure
- Construction: Free‑flowing stainless steel inner‑liner bellows for durability and thermal stability
- Fitment: OEM length left and right; passenger pipe indented for firewall clearance
- Benefits: Faster turbo response, lower exhaust temperatures, direct bolt‑on replacement to factory manifolds
Notes
- Professional installation recommended. Verify exhaust/manifold compatibility on highly modified engines.