Buy With Confidence
Fast & Easy Exchanges
No Hassle | Just Help
Price Match Guarantee
We Match All Legitimate Prices
Same Day FREE Shipping
Order by 2PM EST (Exclusions Apply)
In-House Experts
We Know Diesel Trucks & Equipment
Click on image to zoom

DMAX Diesel LLY, LBZ, & LMM Max-Flow 3" Downpipe | 2004.5-2010 GM Duramax 6.6L

Pricing: $134.99

Free Shipping


Improve Fuel economy, reduce EGT, and make your Duramax Diesel sound better with this Max-Flow 3" Downpipe. Upgrade from the restrictive stock downpipe and allow your turbo to work to its full potential with 20% greater flowover. Gains up to +25HP depending on the supporting modifications and tuning. The included heat wrap will help retain heat reducing EGT while towing heavy loads. The Max-Flow downpipe will increase throttle response because of the smoother flow out of the turbo causing it to spool sooner.

All Downpipes come wrapped with titanium woven heat wrap and two stainless steel hose clamps.


  • 3" Mandrel bent tubing for maximum flow
  • Titanium woven heat wrap for maximum heat retention
  • Improve fuel economy
  • Lower Exhaust Gas Temperatures (EGT)
  • Quicker spool up
  • Improved Throttle response
  • Deeper, throatier sound
  • Up to +25HP gains


  • 3" Downpipe x 1
  • Stainless Steel Hose Clamps x 2
  • Roll of Titanium Heat Wrap x 1

Shipping Information

  • Item Requires Shipping
  • 35.0 lbs.
  • Free Shipping