Seller notes

MBRP 4" Complete Exhaust System NO MUFFLERFits: 2001-2007 Chevy Silverado/GMC Sierra 2500/3500 Duramax 6.6L (Extended or Crew Cab ONLY) Features/BenefitsMandrel Bent Tubing for optimum flow (Free Flowing Exhaust)Delivers a rich, mellow exhaust noteInstalls with common hand toolsCan improve fuel economy by 1-2 MPGBoosts torque and horsepowerTuned & Dyno Tested for Sound & PerformanceComplete Exhaust SystemThe Best Systems Start With the Best MaterialsBuilt from heavy duty aluminized steel our Per...

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