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these covers add strength to center of the transmission case eliminating trans oil seepage at the mating surface
Sold as balanced set upon completion of Custom injector waiver
2017-2019 Duramax L5P 4" Downpipe Back Exhaust w/ Muffler (431021)
From stock to 700+ hp ground pounders
You'll love the unique Stealth sound almost as much as the added performance
2001-2007 Duramax 4" Cat Back Exhaust w/ Muffler (431108) L5P these covers add strength to2001 2007 Duramax 4" Cat Back Exhaust w Muffler (431108) 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 Flo~Pro system. For powerhouse performance, Flo~Pro delivers horsepower you can hear!
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