Cobra Automotive’s 3” diameter aluminized muffled, down-turned exhaust system is designed for race venues with sound restrictions. Low back-pressure Moroso Spiral Flow race mufflers cut noise by 5 to 7 decibels on their own. In total, this system can bring the overall decibels down from the 112-115 level to 100 decibels or less. Check your track’s decibel limits and the location of the meters around the track. All “slip-fit” for easy assembly; includes four straight sections, two mufflers, two down-turned tips and two heavy duty hangers. Welding is required for installation and requires 3” header collectors. The final installed length is 79” to the exit point in front of the rear wheels. Additional flange kit will be required if bolt-on type header collectors are used.