{"product_id":"catback-exhaust-for-pontiac-gto-2004-2006","title":"Catback Exhaust for Pontiac GTO (2004-2006) V8","description":"\u003ch2\u003eHigh-Flow Catback Exhaust for 2004-2006 Pontiac GTO\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This direct bolt-on catback exhaust system replaces the restrictive factory piping to reduce backpressure, improve exhaust scavenging, and deliver an aggressive exhaust note for the LS1 and LS2 powerplants.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GTO Exhaust Restrictions\u003c\/h3\u003e\n\u003cp\u003eThe OEM Pontiac GTO exhaust system was engineered for broad consumer appeal, utilizing smaller diameter, crush-bent piping and heavy baffled mufflers that significantly impede exhaust velocity. This restrictive design introduces excessive backpressure, creating a bottleneck that restricts the 5.7L LS1 and 6.0L LS2 engines from reaching their optimal volumetric efficiency. Furthermore, the factory mild steel components are prone to corrosion and thermal degradation over time, while the heavy stock resonators mute the characteristic V8 firing pulses and often induce unwanted interior drone under heavy engine load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis catback system upgrades the exhaust architecture using 2.5-inch, 16-gauge T-304 stainless steel, ensuring superior corrosion resistance and structural stability under high exhaust gas temperatures. The transition to mandrel-bent piping maintains a constant internal diameter through every curve, virtually eliminating turbulence and boundary layer restrictions found in the stock setup. Finished in an anodized silver with aggressive 4-inch double-wall slant-cut tips, the system optimizes exhaust gas scavenging, actively pulling spent gases from the combustion chamber to improve throttle response and mid-range torque. The direct bolt-on design utilizes factory mounting points, requiring absolutely no drilling or structural modification for installation.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2004-2006 Pontiac GTO\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eLS1 \u0026amp; LS2 V8 \/ V2 (Z-Body)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e350-400 hp \/ 365-400 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004 Pontiac GTO (5.7L LS1 V8)\u003c\/li\u003e\n  \u003cli\u003e2005 Pontiac GTO (6.0L LS2 V8)\u003c\/li\u003e\n  \u003cli\u003e2006 Pontiac GTO (6.0L LS2 V8)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Pontiac Muscle Heritage\u003c\/h3\u003e\n\u003cp\u003eMaximizing the breathing capability of a modern muscle car is critical for producing reliable power. This exhaust system ensures the LS platform delivers the raw, uninhibited V8 roar and mechanical efficiency synonymous with American muscle, reducing thermal load without sacrificing drivability.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50082262745336,"sku":"DS-EFH79YFVK","price":549.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catback-exhaust-for-pontiac-gto-2004-2006-1.jpg?v=1785438460","url":"https:\/\/performancechiptuning.com\/fr\/products\/catback-exhaust-for-pontiac-gto-2004-2006","provider":"Performance Chip Tuning","version":"1.0","type":"link"}