The Magnaflow Axle-Back Exhaust Systems for the Pontiac G8 (http://intense-racing.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=IR&Product_Code=G8-MFL-16883&Category_Code=G8_Exhaust) are 100% polished stainless steel and lap-joint welded for solid construction and rugged reliability even in the most extreme conditions. They feature a free-flowing, straight-through perforated stainless steel core, stainless mesh wrap and acoustical fiber fill to deliver that smooth, deep tone. Mufflers are packed tight with this acoustical material unlike some others; products to ensure long life and no sound degradation over time. Backed by a Lifetime Warranty.

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