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40 Cal / 50 Cal Downpipe Back Exhaust for 2011 to 2015 GM Duramax 6.6L
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)

    • 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
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