4" Downpipe Back Single With Muffler | 2017-2019 GM 2500/3500 6.6L DURAMAX L5P-431021

Constructed out of 16 gauge aluminized steel or T409 Stainless, this exhaust system is designed to simplify installation with included clamps, preweld contour bends and improved flanges. Enjoy a noticeable boost in performance, lowered EGTs and amplified air flow with this Mel's system. For powerhouse performance, Mel's delivers - horsepower you can hear!

* IMPORTANT NOTE: These kits will only fit models equipped with the OEM style 4-bolt flange off the turbo direct pipe! 

 These parts are for use on non-registered race vehicles on closed-course competition events *Installing or using this part on any emission-controlled vehicle ("street" or "off-road") may violate federal and/or state emissions laws and regulations. *Not available to ship to the United States

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