Banks (48701) Monster exhaust system 325-hp engine | Crew cab, long bed 2004-07
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The 4" Monster exhaust cat-back system flows up to 122% better than stock and virtually eliminates backpressure. The system's pipes bolt behind the turbocharger (some applications). Banks' streamlined 4" turbine outlet pipe (not required with 325 hp systems), intermediate pipe(s) and tailpipe are formed of stainless, heavy-wall tubing with constant-diameter bends to maximize airflow and lower exhaust gas temps.
Banks replaces the factory's restrictive muffler with a polished-stainless Monster muffler featuring a straight-through 4"-diameter path that flows up to 129% better than stock. The Banks-designed expansion chamber dissipates the annoying mid-range exhaust drone that accompanies most straight-through mufflers. Monster muffler utilizes spun ceramic, very-high-temperature packing and delivers an authoritative--but never intrusive--exhaust sound. And the 5” polished rolled-edge tip has an adjustable clamp for positioning on tailpipe. Get it in your choice of chrome-over stainless or high temp black! (And to help keep it looking good, there's a 1/2" air gap to keep heat from tarnishing the finish.)