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This downpipe back race exhaust allows for the removal of the catalytic converter and the DPF filter from the exhaust system for off-road use. Does not fit the late model 2015's with a 3 bolt flange. 
 
Available in 40 Cal 4" or 50 Cal 5" sizes.
 
*Will not fit Cab & Chassis trucks.
 
*Off-road use only. Custom tuning is required*

GM Duramax 6.6L - 40 Cal / 50 Cal Downpipe Back Exhaust (2011-2015)

Rating is 5.0 out of five stars based on 1 review
    • 2011, 2012, 2013, 2014, & 2015 GMC Sierra 2500 / 3500 HD with a 6.6L Duramax engine.
       
    • 2011, 2012, 2013, 2014, & 2015 Chevrolet Silverado 2500 / 3500 HD with a 6.6L Duramax engine.
       
    • Does not fit the late model 2015's with a 3 bolt flange.
       
    • Will not fit Cab & Chassis trucks.
    • Available in 4" or 5" stainless steel piping 
    • OE style hangers for easy installation
    • Straight-through design for maximum exhaust flow
    • Maximum flow for competition applications
    • No bungs

Reviews

Rated 5 out of 5 stars.
Based on 1 review
1 review
  • Jim FrendtOct 20
    Rated 5 out of 5 stars.
    Down pipe back 4” exhaust

    Great fit and quality. Would recommend and installs easily. Never heard of them before, but glad I ordered this exhaust. Vendors shipped it out fast . Uses OEM hangers

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