Optimizes airflow, air density, continuous power MPG. Honors the host vehicle improves longevity. Delivers top gains of 51 hp and 68 lb - ft torque, plus better fuel economy. (2001 - 2002 and 2004 - 2010 models only) Class - A Motorhome, W - Series and P - Series Affordable stainless - steel Stinger includes Banks all - new Ram - Air intake system (available for W - Series only) that eliminates restrictions for effortless flow. Optional AutoMind Programmer removes the factory - imposed power delay so you'll have acceleration when you need it. Stinger delivers top gains of 51 hp and 68 lb - ft torque to the rear - wheels, plus better fuel economy. Because engine airflow is the central principle to Stinger and all Banks power - enhancement products, you'll have a more durable vehicle and longer engine life. Includes High - flow Banks Ram - Air intake system (W - Series only) with Ram - Air filter, filter housing cover, large - sized tubing, and adapter, AutoMind Programmer (available for 2001 - 2005 models), Stainless, constant - diameter Monster exhaust with 4 inch tailpipe, Polished - stainless, 5 inch double - wall tailpipe tip with rolled edge, Comprehensive Owner's Installation Manual. Motorhome Power. Gasoline GM 8.1L Workhorse. Test vehicle 2004 Workhorse W - 22, GM 8.1L V - 8. Transmission 5 - speed Allison.