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.