$539.99
The AEM 21-681C Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle’s restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific Audi A4 models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The air filter is located in the original air box space and is protected by a heat shield which is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable gunmetal gray powder coated finish. This air intake system was developed to accommodate the engine’s factory emissions control devices including the mass air flow sensor. The cylinder shaped AEM Dryflow air filter is made from an oil-free, synthetic filter media that can be used for up to 100,000 miles before cleaning is needed (depending on driving conditions). The air intake system is backed by AEM’s Lifetime Limited Warranty. Some AEM air intakes are not legal for sale or use in California and other states adopting California emission standards while others are 50 state legal. View the 21-681C vehicle applications to determine the legal status for each vehicle.
AEM’s Performance Cold Air Intake Systems are tuned and dyno-tested to give your engine more power and acceleration by replacing the restrictive factory air filter, air intake tubing and air box assembly.
The AEM 21-681C Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle’s restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific Audi A4 models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The air filter is located in the original air box space and is protected by a heat shield which is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable gunmetal gray powder coated finish. This air intake system was developed to accommodate the engine’s factory emissions control devices including the mass air flow sensor. The cylinder shaped AEM Dryflow air filter is made from an oil-free, synthetic filter media that can be used for up to 100,000 miles before cleaning is needed (depending on driving conditions). The air intake system is backed by AEM’s Lifetime Limited Warranty. Some AEM air intakes are not legal for sale or use in California and other states adopting California emission standards while others are 50 state legal. View the 21-681C vehicle applications to determine the legal status for each vehicle.
AEM’s Performance Cold Air Intake Systems are tuned and dyno-tested to give your engine more power and acceleration by replacing the restrictive factory air filter, air intake tubing and air box assembly.
Fitment
1999 Chevrolet Silverado 1500
1999 Chevrolet Silverado 2500
1999 GMC Sierra 1500
1999 GMC Sierra 2500
2000 Chevrolet Silverado 1500
2000 Chevrolet Silverado 2500
2000 Chevrolet Suburban 1500
2000 Chevrolet Suburban 2500
2000 Chevrolet Tahoe
2000 GMC Sierra 1500
2000 GMC Sierra 2500
2000 GMC Yukon
2000 GMC Yukon XL 2500
2001 Chevrolet Silverado 1500
2001 Chevrolet Silverado 1500 HD
2001 Chevrolet Silverado 2500
2001 Chevrolet Silverado 2500 HD
2001 Chevrolet Silverado 3500
2001 Chevrolet Suburban 1500
2001 Chevrolet Suburban 2500
2001 Chevrolet Tahoe
2001 GMC Sierra 1500
2001 GMC Sierra 1500 HD
2001 GMC Sierra 2500
2001 GMC Sierra 2500 HD
2001 GMC Sierra 3500
2001 GMC Yukon
2001 GMC Yukon XL 1500
2001 GMC Yukon XL 2500
2002 Cadillac Escalade
2002 Cadillac Escalade EXT
2002 Chevrolet Avalanche 1500
2002 Chevrolet Silverado 1500
2002 Chevrolet Silverado 1500 HD
2002 Chevrolet Silverado 2500
2002 Chevrolet Silverado 2500 HD
2002 Chevrolet Silverado 3500
2002 Chevrolet Suburban 1500
2002 Chevrolet Suburban 2500
2002 Chevrolet Tahoe
2002 GMC Sierra 1500
2002 GMC Sierra 1500 HD
2002 GMC Sierra 2500
2002 GMC Sierra 2500 HD
2002 GMC Sierra 3500
2002 GMC Yukon
2002 GMC Yukon XL 1500
2002 GMC Yukon XL 2500
2003 Cadillac Escalade
2003 Cadillac Escalade ESV
2003 Cadillac Escalade EXT
2003 Chevrolet Avalanche 1500
2003 Chevrolet Silverado 1500
2003 Chevrolet Silverado 1500 HD
2003 Chevrolet Silverado 2500
2003 Chevrolet Silverado 2500 HD
2003 Chevrolet Silverado 3500
2003 Chevrolet Suburban 1500
2003 Chevrolet Suburban 2500
2003 Chevrolet Tahoe
2003 GMC Sierra 1500
2003 GMC Sierra 1500 HD
2003 GMC Sierra 2500
2003 GMC Sierra 2500 HD
2003 GMC Sierra 3500
2003 GMC Yukon
2003 GMC Yukon XL 1500
2003 GMC Yukon XL 2500
2004 Cadillac Escalade
2004 Cadillac Escalade ESV
2004 Cadillac Escalade EXT
2004 Chevrolet Avalanche 1500
2004 Chevrolet Silverado 1500
2004 Chevrolet Silverado 2500
2004 Chevrolet Silverado 2500 HD
2004 Chevrolet Silverado 3500
2004 Chevrolet Suburban 1500
2004 Chevrolet Suburban 2500
2004 Chevrolet Tahoe
2004 GMC Sierra 1500
2004 GMC Sierra 2500
2004 GMC Sierra 2500 HD
2004 GMC Sierra 3500
2004 GMC Yukon
2004 GMC Yukon XL 1500
2004 GMC Yukon XL 2500
2005 Cadillac Escalade
2005 Cadillac Escalade ESV
2005 Cadillac Escalade EXT
2005 Chevrolet Avalanche 1500
2005 Chevrolet Silverado 1500
2005 Chevrolet Silverado 1500 HD
2005 Chevrolet Silverado 2500 HD
2005 Chevrolet Silverado 3500
2005 Chevrolet Suburban 1500
2005 Chevrolet Suburban 2500
2005 Chevrolet Tahoe
2005 GMC Sierra 1500
2005 GMC Sierra 1500 HD
2005 GMC Sierra 2500 HD
2005 GMC Sierra 3500
2005 GMC Yukon
2005 GMC Yukon XL 1500
2005 GMC Yukon XL 2500
2006 Cadillac Escalade
2006 Cadillac Escalade ESV
2006 Cadillac Escalade EXT
2006 Chevrolet Avalanche 1500
2006 Chevrolet Silverado 1500
2006 Chevrolet Silverado 1500 HD
2006 Chevrolet Silverado 2500 HD
2006 Chevrolet Silverado 3500
2006 Chevrolet Suburban 1500
2006 Chevrolet Suburban 2500
2006 Chevrolet Tahoe
2006 GMC Sierra 1500
2006 GMC Sierra 1500 HD
2006 GMC Sierra 2500 HD
2006 GMC Sierra 3500
2006 GMC Yukon
2006 GMC Yukon XL 1500
2006 GMC Yukon XL 2500
2007 Chevrolet Silverado 1500 Classic
2007 Chevrolet Silverado 1500 HD Classic
2007 Chevrolet Silverado 2500 HD Classic
2007 GMC Sierra 1500 Classic
2007 GMC Sierra 1500 HD Classic
2007 GMC Sierra 2500 HD Classic
2007 GMC Sierra 3500 Classic
