{"product_id":"flowmaster-american-thunder-cat-back-exhaust-system-for-chevy-silverado-gmc-sierra-1500-2004-2007","title":"Flowmaster American Thunder Cat-Back Exhaust System for Chevy Silverado \u0026 GMC Sierra 1500 2004-2007","description":"For the person who is looking for an aluminized steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone. The American Thunder® system is heavy 16-gauge mandrel-bent aluminized steel tubing for durability and maximum performance. Includes a Super 40™ Series performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that won't drive you out of the cab when having a conversation. The dual 2.50-inch tailpipes clear the factory spare tire and give you two choices of exit locations. Straight out the back for that true dual look, or exiting out each side behind the rear wheels, which is ideal for towing. The system is finished off with a pair of highly polished 304 stainless steel tips embossed with the Flowmaster® name. Designed for an easy fit, these systems include all necessary parts, hardware and instructions for an easy installation you can do at home. Covered by our 3-year Limited Warranty. For those who prefer all stainless steel construction with a Lifetime Limited Warranty, check out exhaust system #817428. Notes: Fits 2\/4 wheel drive with extended cab\/short bed with 143.5-inch wheelbase.\n1999-2007* Chevrolet Silverado, GMC Sierra 1500 4.3L, 4.8L, 5.3L engine. Aluminized Steel - Aggressive to moderate sound\nFits 1999-2007* (*Classic body) Chevrolet Silverado \u0026amp; GMC Sierra 1500 4.3L, 4.8L and 5.3L engine with single-flanged catalytic converter. Fits 2\/4 wheel drive with extended cab\/short bed with 143.5-inch wheelbase.\n\u003cul\u003e\n  \u003cli\u003eIncludes Hangers and Hardware for an Easy Installation\u003c\/li\u003e\n  \u003cli\u003eMandrel-bent 16-gauge Aluminized Steel Tubing\u003c\/li\u003e\n  \u003cli\u003eModerate to Aggressive Exterior Exhaust Tone\u003c\/li\u003e\n  \u003cli\u003eConnects After Factory Catalytic Converter\u003c\/li\u003e\n  \u003cli\u003eSuper 40 Series Performance Muffler\u003c\/li\u003e\n  \u003cli\u003eDyno-tuned for Maximum Performance\u003c\/li\u003e\n  \u003cli\u003eUses the Factory Hanger Locations\u003c\/li\u003e\n  \u003cli\u003e3-Year Limited Warranty\u003c\/li\u003e\n  \u003cli\u003eEasy Installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Flowmaster American Thunder cat-back exhaust system is designed for 2004-2007 Chevrolet Silverado and GMC Sierra 1500 models with 143.5-inch wheelbase, offering a combination of durability and performance. Crafted from heavy-duty 16-gauge mandrel-bent aluminized steel tubing, this system ensures maximum longevity and optimal flow for enhanced vehicle performance. The inclusion of a Super 40 Series performance muffler provides an aggressive exterior exhaust tone, adding a commanding presence to your truck, while maintaining a moderate interior noise level for comfortable everyday driving. This balance makes it ideal for drivers seeking a sporty sound without excessive cabin noise. The dual 2.50-inch tailpipes are designed to clear the factory spare tire and offer two exit options: a traditional straight-out-the-back dual exit or side exits behind the rear wheels, which are particularly useful for towing applications. The system is completed with polished 304 stainless steel tips embossed with the Flowmaster logo, giving your truck a refined appearance. Installation is straightforward with included hardware, hangers, and instructions, allowing for a hassle-free setup that can be performed at home. Covered by a 3-year limited warranty, this exhaust system provides a reliable upgrade to enhance your vehicle's sound and performance. For those seeking all stainless steel construction with a lifetime warranty, Flowmaster offers a compatible system under part number 817428. This exhaust system is EPA compliant and designed specifically for 2\/4 wheel-drive models with extended cabs and short beds, making it an excellent choice for Silverado and Sierra owners looking to improve sound and exhaust flow.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eIncludes hangers and hardware for easy installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMandrel-bent 16-gauge aluminized steel tubing for durability and optimal flow\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eProduces an aggressive exterior sound with a moderate interior tone\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eConnects after factory catalytic converter for seamless integration\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSuper 40 Series performance muffler for enhanced exhaust flow and sound\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDyno-tuned for maximum performance and efficiency\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eUses factory hanger locations for easy mounting\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCovered by a 3-year limited warranty for peace of mind\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDesigned for easy installation with all necessary parts included\u003c\/li\u003e\u003c\/ul\u003e\u003cbr\u003e\nFitments:\u003cbr\u003e\n1999 Chevrolet Silverado 1500 Base\u003cbr\u003e\n1999 Chevrolet Silverado 1500 LS\u003cbr\u003e\n1999 Chevrolet Silverado 1500 LT\u003cbr\u003e\n1999 GMC Sierra 1500 SL\u003cbr\u003e\n1999 GMC Sierra 1500 SLE\u003cbr\u003e\n1999 GMC Sierra 1500 SLT\u003cbr\u003e\n2000 Chevrolet Silverado 1500 Base\u003cbr\u003e\n2000 Chevrolet Silverado 1500 LS\u003cbr\u003e\n2000 Chevrolet Silverado 1500 LT\u003cbr\u003e\n2000 GMC Sierra 1500 SL\u003cbr\u003e\n2000 GMC Sierra 1500 SLE\u003cbr\u003e\n2000 GMC Sierra 1500 SLT\u003cbr\u003e\n2001 Chevrolet Silverado 1500 Base\u003cbr\u003e\n2001 Chevrolet Silverado 1500 LS\u003cbr\u003e\n2001 Chevrolet Silverado 1500 LT\u003cbr\u003e\n2001 GMC Sierra 1500 SL\u003cbr\u003e\n2001 GMC Sierra 1500 SLE\u003cbr\u003e\n2001 GMC Sierra 1500 SLT\u003cbr\u003e\n2002 Chevrolet Silverado 1500 Base\u003cbr\u003e\n2002 Chevrolet Silverado 1500 LS\u003cbr\u003e\n2002 Chevrolet Silverado 1500 LT\u003cbr\u003e\n2002 Chevrolet Silverado 1500 WT\u003cbr\u003e\n2002 GMC Sierra 1500 Base\u003cbr\u003e\n2002 GMC Sierra 1500 HT\u003cbr\u003e\n2002 GMC Sierra 1500 SL\u003cbr\u003e\n2002 GMC Sierra 1500 SLE\u003cbr\u003e\n2002 GMC Sierra 1500 SLT\u003cbr\u003e\n2002 GMC Sierra 1500 WT\u003cbr\u003e\n2003 Chevrolet Silverado 1500 Base\u003cbr\u003e\n2003 Chevrolet Silverado 1500 LS\u003cbr\u003e\n2003 Chevrolet Silverado 1500 LT\u003cbr\u003e\n2003 Chevrolet Silverado 1500 WT\u003cbr\u003e\n2003 GMC Sierra 1500 Base\u003cbr\u003e\n2003 GMC Sierra 1500 SL\u003cbr\u003e\n2003 GMC Sierra 1500 SLE\u003cbr\u003e\n2003 GMC Sierra 1500 SLT\u003cbr\u003e\n2003 GMC Sierra 1500 WT\u003cbr\u003e\n2004 Chevrolet Silverado 1500 Base\u003cbr\u003e\n2004 Chevrolet Silverado 1500 Hybrid\u003cbr\u003e\n2004 Chevrolet Silverado 1500 LS\u003cbr\u003e\n2004 Chevrolet Silverado 1500 LT\u003cbr\u003e\n2004 Chevrolet Silverado 1500 WT\u003cbr\u003e\n2004 Chevrolet Silverado 1500 Z71\u003cbr\u003e\n2004 GMC Sierra 1500 Base\u003cbr\u003e\n2004 GMC Sierra 1500 SLE\u003cbr\u003e\n2004 GMC Sierra 1500 SLT\u003cbr\u003e\n2004 GMC Sierra 1500 WT\u003cbr\u003e\n2005 Chevrolet Silverado 1500 Base\u003cbr\u003e\n2005 Chevrolet Silverado 1500 Hybrid\u003cbr\u003e\n2005 Chevrolet Silverado 1500 LS\u003cbr\u003e\n2005 Chevrolet Silverado 1500 LT\u003cbr\u003e\n2005 Chevrolet Silverado 1500 WT\u003cbr\u003e\n2005 Chevrolet Silverado 1500 Z71 Off-Road\u003cbr\u003e\n2005 GMC Sierra 1500 Base\u003cbr\u003e\n2005 GMC Sierra 1500 Hybrid\u003cbr\u003e\n2005 GMC Sierra 1500 SLE\u003cbr\u003e\n2005 GMC Sierra 1500 SLT\u003cbr\u003e\n2005 GMC Sierra 1500 WT\u003cbr\u003e\n2006 Chevrolet Silverado 1500 Hybrid\u003cbr\u003e\n2006 Chevrolet Silverado 1500 LS\u003cbr\u003e\n2006 Chevrolet Silverado 1500 LT\u003cbr\u003e\n2006 Chevrolet Silverado 1500 WT\u003cbr\u003e\n2006 GMC Sierra 1500 Hybrid\u003cbr\u003e\n2006 GMC Sierra 1500 SL\u003cbr\u003e\n2006 GMC Sierra 1500 SLE\u003cbr\u003e\n2006 GMC Sierra 1500 SLT\u003cbr\u003e\n2006 GMC Sierra 1500 WT\u003cbr\u003e\n2007 Chevrolet Silverado 1500 Classic Hybrid\u003cbr\u003e\n2007 Chevrolet Silverado 1500 Classic LS\u003cbr\u003e\n2007 Chevrolet Silverado 1500 Classic LT\u003cbr\u003e\n2007 Chevrolet Silverado 1500 Classic WT\u003cbr\u003e\n2007 GMC Sierra 1500 Classic Hybrid\u003cbr\u003e\n2007 GMC Sierra 1500 Classic SL\u003cbr\u003e\n2007 GMC Sierra 1500 Classic SLE\u003cbr\u003e\n2007 GMC Sierra 1500 Classic SLT\u003cbr\u003e\n2007 GMC Sierra 1500 Classic WT\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; 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