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Gibson Deegan 38 Dual Sport Exhaust Systems for Chevy/GMC feature aluminized or stainless steel mandrel-bent tubing. They are well-designed and built to provide improved acceleration, more powerful exhaust tone, and increased in horsepower gain and torque. The Deegan 38 Black Series provides smoother sound through Gibson’s proven stainless steel SuperFlow Muffler. Their high-quality tubing make these exhaust systems functional for a lifetime.