HEARTTHROB HIGH PERFORMANCE 5" DUAL EXIT DIESEL EXHAUST SYSTEMS If you haul or tow big loads you need the increased horsepower and torque that only a massive 5" exhaust system can deliver! You'll experience impressive gains in passing, hauling and climbing, not to mention that mellow, smooth Heartthrob sound! Corrosion resistant aluminized 16-gauge steel, double wrapped muffler; replace entire system after turbo.