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Manufacturer's Part Number: HS54557
The thread rolling operation is also done after the heat-treatment
7mm compressor wheel
differences in cooling temperatures
Specially engineered to minimize friction and maximize lubrication
2001-2007 Duramax 4" Downpipe Back Exhaust w/ Muffler (431107 / 432107) Material:Aluminized Manufacturer's Part Number: HS545572001 2007 Duramax 4" Downpipe Back Exhaust w Muffler (431107 432107) 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!