Description

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:
CadillacEscaladeBase2002
CadillacEscaladeBase2003
CadillacEscaladeBase2004
CadillacEscaladeBase2005
CadillacEscaladeBase2006
CadillacEscalade ESVBase2003
CadillacEscalade ESVBase2004
CadillacEscalade ESVBase2005
CadillacEscalade ESVBase2006
CadillacEscalade EXTBase2002
CadillacEscalade EXTBase2003
CadillacEscalade EXTBase2004
CadillacEscalade EXTBase2005
CadillacEscalade EXTBase2006
ChevroletAvalanche 1500Base2002
ChevroletAvalanche 1500Base2003
ChevroletAvalanche 1500Base2004
ChevroletAvalanche 1500Base2005
ChevroletAvalanche 1500LS2005
ChevroletAvalanche 1500LS2006
ChevroletAvalanche 1500LT2005
ChevroletAvalanche 1500LT2006
ChevroletAvalanche 1500North Face2002
ChevroletAvalanche 1500North Face2003
ChevroletAvalanche 1500On Road Edition2002
ChevroletAvalanche 1500On Road Edition2003
ChevroletAvalanche 1500WBH2003
ChevroletAvalanche 1500Z662004
ChevroletAvalanche 1500Z662005
ChevroletAvalanche 1500Z662006
ChevroletAvalanche 1500Z712002
ChevroletAvalanche 1500Z712003
ChevroletAvalanche 1500Z712004
ChevroletAvalanche 1500Z712005
ChevroletAvalanche 1500Z712006
ChevroletSilverado 1500Base1999
ChevroletSilverado 1500Base2000
ChevroletSilverado 1500Base2001
ChevroletSilverado 1500Base2002
ChevroletSilverado 1500Base2003
ChevroletSilverado 1500Base2004
ChevroletSilverado 1500Base2005
ChevroletSilverado 1500Hybrid2004
ChevroletSilverado 1500Hybrid2005
ChevroletSilverado 1500Hybrid2006
ChevroletSilverado 1500LS1999
ChevroletSilverado 1500LS2000
ChevroletSilverado 1500LS2001
ChevroletSilverado 1500LS2002
ChevroletSilverado 1500LS2003
ChevroletSilverado 1500LS2004
ChevroletSilverado 1500LS2005
ChevroletSilverado 1500LS2006
ChevroletSilverado 1500LT1999
ChevroletSilverado 1500LT2000
ChevroletSilverado 1500LT2001
ChevroletSilverado 1500LT2002
ChevroletSilverado 1500LT2003
ChevroletSilverado 1500LT2004
ChevroletSilverado 1500LT2005
ChevroletSilverado 1500LT2006
ChevroletSilverado 1500SS2003
ChevroletSilverado 1500SS2004
ChevroletSilverado 1500SS2005
ChevroletSilverado 1500SS2006
ChevroletSilverado 1500WT2002
ChevroletSilverado 1500WT2003
ChevroletSilverado 1500WT2004
ChevroletSilverado 1500WT2005
ChevroletSilverado 1500WT2006
ChevroletSilverado 1500Z712004
ChevroletSilverado 1500 ClassicHybrid2007
ChevroletSilverado 1500 ClassicLS2007
ChevroletSilverado 1500 ClassicLT2007
ChevroletSilverado 1500 ClassicSS2007
ChevroletSilverado 1500 ClassicWT2007
ChevroletSilverado 1500 HDBase2005
ChevroletSilverado 1500 HDLS2001
ChevroletSilverado 1500 HDLS2002
ChevroletSilverado 1500 HDLS2003
ChevroletSilverado 1500 HDLS2005
ChevroletSilverado 1500 HDLT2001
ChevroletSilverado 1500 HDLT2002
ChevroletSilverado 1500 HDLT2003
ChevroletSilverado 1500 HDLT2005
ChevroletSilverado 1500 HDLT2006
ChevroletSilverado 1500 HD ClassicLT2007
ChevroletSilverado 2500Base1999
ChevroletSilverado 2500Base2000
ChevroletSilverado 2500Base2001
ChevroletSilverado 2500Base2002
ChevroletSilverado 2500Base2003
ChevroletSilverado 2500Base2004
ChevroletSilverado 2500LS1999
ChevroletSilverado 2500LS2000
ChevroletSilverado 2500LS2001
ChevroletSilverado 2500LS2002
ChevroletSilverado 2500LS2003
ChevroletSilverado 2500LS2004
ChevroletSilverado 2500LT1999
ChevroletSilverado 2500LT2000
ChevroletSilverado 2500LT2001
ChevroletSilverado 2500LT2002
ChevroletSilverado 2500LT2003
ChevroletSilverado 2500LT2004
ChevroletSilverado 2500WT2004
ChevroletSilverado 2500 HDBase2001
ChevroletSilverado 2500 HDBase2002
ChevroletSilverado 2500 HDBase2003
ChevroletSilverado 2500 HDBase2004
ChevroletSilverado 2500 HDBase2005
ChevroletSilverado 2500 HDLS2001
ChevroletSilverado 2500 HDLS2002
ChevroletSilverado 2500 HDLS2003
ChevroletSilverado 2500 HDLS2004
ChevroletSilverado 2500 HDLS2005
ChevroletSilverado 2500 HDLS2006
ChevroletSilverado 2500 HDLT2001
ChevroletSilverado 2500 HDLT2002
ChevroletSilverado 2500 HDLT2003
ChevroletSilverado 2500 HDLT2004
ChevroletSilverado 2500 HDLT2005
ChevroletSilverado 2500 HDLT2006
ChevroletSilverado 2500 HDWT2003
ChevroletSilverado 2500 HDWT2004
ChevroletSilverado 2500 HDWT2005
ChevroletSilverado 2500 HDWT2006
ChevroletSilverado 2500 HD ClassicLS2007
ChevroletSilverado 2500 HD ClassicLT2007
ChevroletSilverado 2500 HD ClassicWT2007
ChevroletSilverado 3500Base2001
ChevroletSilverado 3500Base2002
ChevroletSilverado 3500Base2003
ChevroletSilverado 3500Base2004
ChevroletSilverado 3500Base2005
ChevroletSilverado 3500LS2001
ChevroletSilverado 3500LS2002
ChevroletSilverado 3500LS2003
ChevroletSilverado 3500LS2004
ChevroletSilverado 3500LS2005
ChevroletSilverado 3500LS2006
ChevroletSilverado 3500LT2001
ChevroletSilverado 3500LT2002
ChevroletSilverado 3500LT2003
ChevroletSilverado 3500LT2004
ChevroletSilverado 3500LT2005
ChevroletSilverado 3500LT2006
ChevroletSilverado 3500WT2004
ChevroletSilverado 3500WT2006
ChevroletSuburban 1500Base2000
ChevroletSuburban 1500Base2001
ChevroletSuburban 1500Base2006
ChevroletSuburban 1500LS2000
ChevroletSuburban 1500LS2001
ChevroletSuburban 1500LS2002
ChevroletSuburban 1500LS2003
ChevroletSuburban 1500LS2004
ChevroletSuburban 1500LS2005
ChevroletSuburban 1500LS2006
ChevroletSuburban 1500LT2000
ChevroletSuburban 1500LT2001
ChevroletSuburban 1500LT2002
ChevroletSuburban 1500LT2003
ChevroletSuburban 1500LT2004
ChevroletSuburban 1500LT2005
ChevroletSuburban 1500LT2006
ChevroletSuburban 1500LTZ2006
ChevroletSuburban 1500Z712004
ChevroletSuburban 1500Z712005
ChevroletSuburban 1500Z712006
ChevroletSuburban 2500Base2000
ChevroletSuburban 2500Base2001
ChevroletSuburban 2500LS2000
ChevroletSuburban 2500LS2001
ChevroletSuburban 2500LS2002
ChevroletSuburban 2500LS2003
ChevroletSuburban 2500LS2004
ChevroletSuburban 2500LS2005
ChevroletSuburban 2500LS2006
ChevroletSuburban 2500LT2000
ChevroletSuburban 2500LT2001
ChevroletSuburban 2500LT2002
ChevroletSuburban 2500LT2003
ChevroletSuburban 2500LT2004
ChevroletSuburban 2500LT2005
ChevroletSuburban 2500LT2006
ChevroletTahoeBase2000
ChevroletTahoeBase2001
ChevroletTahoeBase2006
ChevroletTahoeLS2000
ChevroletTahoeLS2001
ChevroletTahoeLS2002
ChevroletTahoeLS2003
ChevroletTahoeLS2004
ChevroletTahoeLS2005
ChevroletTahoeLS2006
ChevroletTahoeLT2000
ChevroletTahoeLT2001
ChevroletTahoeLT2002
ChevroletTahoeLT2003
ChevroletTahoeLT2004
ChevroletTahoeLT2005
ChevroletTahoeLT2006
ChevroletTahoeZ712003
ChevroletTahoeZ712004
ChevroletTahoeZ712005
ChevroletTahoeZ712006
GMCSierra 1500Base2002
GMCSierra 1500Base2003
GMCSierra 1500Base2004
GMCSierra 1500Base2005
GMCSierra 1500C32001
GMCSierra 1500Denali2002
GMCSierra 1500Denali2003
GMCSierra 1500Denali2004
GMCSierra 1500Denali2005
GMCSierra 1500Denali2006
GMCSierra 1500HT2002
GMCSierra 1500Hybrid2005
GMCSierra 1500Hybrid2006
GMCSierra 1500SL1999
GMCSierra 1500SL2000
GMCSierra 1500SL2001
GMCSierra 1500SL2002
GMCSierra 1500SL2003
GMCSierra 1500SL2006
GMCSierra 1500SLE1999
GMCSierra 1500SLE2000
GMCSierra 1500SLE2001
GMCSierra 1500SLE2002
GMCSierra 1500SLE2003
GMCSierra 1500SLE2004
GMCSierra 1500SLE2005
GMCSierra 1500SLE2006
GMCSierra 1500SLT1999
GMCSierra 1500SLT2000
GMCSierra 1500SLT2001
GMCSierra 1500SLT2002
GMCSierra 1500SLT2003
GMCSierra 1500SLT2004
GMCSierra 1500SLT2005
GMCSierra 1500SLT2006
GMCSierra 1500WT2002
GMCSierra 1500WT2003
GMCSierra 1500WT2004
GMCSierra 1500WT2005
GMCSierra 1500WT2006
GMCSierra 1500 ClassicDenali2007
GMCSierra 1500 ClassicHybrid2007
GMCSierra 1500 ClassicSL2007
GMCSierra 1500 ClassicSLE2007
GMCSierra 1500 ClassicSLT2007
GMCSierra 1500 ClassicWT2007
GMCSierra 1500 HDSLE2001
GMCSierra 1500 HDSLE2002
GMCSierra 1500 HDSLE2003
GMCSierra 1500 HDSLE2005
GMCSierra 1500 HDSLE2006
GMCSierra 1500 HDSLT2001
GMCSierra 1500 HDSLT2002
GMCSierra 1500 HDSLT2003
GMCSierra 1500 HDSLT2005
GMCSierra 1500 HDSLT2006
GMCSierra 1500 HD ClassicSLE2007
GMCSierra 1500 HD ClassicSLT2007
GMCSierra 2500Base2002
GMCSierra 2500Base2003
GMCSierra 2500Base2004
GMCSierra 2500SL1999
GMCSierra 2500SL2000
GMCSierra 2500SL2001
GMCSierra 2500SL2002
GMCSierra 2500SLE1999
GMCSierra 2500SLE2000
GMCSierra 2500SLE2001
GMCSierra 2500SLE2002
GMCSierra 2500SLE2003
GMCSierra 2500SLE2004
GMCSierra 2500SLT1999
GMCSierra 2500SLT2000
GMCSierra 2500SLT2001
GMCSierra 2500SLT2002
GMCSierra 2500SLT2003
GMCSierra 2500SLT2004
GMCSierra 2500WT2003
GMCSierra 2500WT2004
GMCSierra 2500 HDBase2002
GMCSierra 2500 HDBase2003
GMCSierra 2500 HDBase2004
GMCSierra 2500 HDBase2005
GMCSierra 2500 HDSL2001
GMCSierra 2500 HDSL2002
GMCSierra 2500 HDSL2006
GMCSierra 2500 HDSLE2001
GMCSierra 2500 HDSLE2002
GMCSierra 2500 HDSLE2003
GMCSierra 2500 HDSLE2004
GMCSierra 2500 HDSLE2005
GMCSierra 2500 HDSLE2006
GMCSierra 2500 HDSLT2001
GMCSierra 2500 HDSLT2002
GMCSierra 2500 HDSLT2003
GMCSierra 2500 HDSLT2004
GMCSierra 2500 HDSLT2005
GMCSierra 2500 HDSLT2006
GMCSierra 2500 HDWT2003
GMCSierra 2500 HDWT2004
GMCSierra 2500 HDWT2005
GMCSierra 2500 HDWT2006
GMCSierra 2500 HD ClassicSL2007
GMCSierra 2500 HD ClassicSLE2007
GMCSierra 2500 HD ClassicSLT2007
GMCSierra 2500 HD ClassicWT2007
GMCSierra 3500Base2002
GMCSierra 3500Base2003
GMCSierra 3500Base2004
GMCSierra 3500Base2005
GMCSierra 3500SL2001
GMCSierra 3500SL2002
GMCSierra 3500SL2006
GMCSierra 3500SLE2001
GMCSierra 3500SLE2002
GMCSierra 3500SLE2003
GMCSierra 3500SLE2004
GMCSierra 3500SLE2005
GMCSierra 3500SLE2006
GMCSierra 3500SLT2001
GMCSierra 3500SLT2002
GMCSierra 3500SLT2003
GMCSierra 3500SLT2004
GMCSierra 3500SLT2005
GMCSierra 3500SLT2006
GMCSierra 3500WT2004
GMCSierra 3500WT2005
GMCSierra 3500WT2006
GMCSierra 3500 ClassicSL2007
GMCSierra 3500 ClassicSLE2007
GMCSierra 3500 ClassicSLT2007
GMCSierra 3500 ClassicWT2007
GMCYukonDenali2001
GMCYukonDenali2002
GMCYukonDenali2003
GMCYukonDenali2004
GMCYukonDenali2005
GMCYukonDenali2006
GMCYukonSL2006
GMCYukonSLE2000
GMCYukonSLE2001
GMCYukonSLE2002
GMCYukonSLE2003
GMCYukonSLE2004
GMCYukonSLE2005
GMCYukonSLE2006
GMCYukonSLT2000
GMCYukonSLT2001
GMCYukonSLT2002
GMCYukonSLT2003
GMCYukonSLT2004
GMCYukonSLT2005
GMCYukonSLT2006
GMCYukon XL 1500Denali2001
GMCYukon XL 1500Denali2002
GMCYukon XL 1500Denali2003
GMCYukon XL 1500Denali2004
GMCYukon XL 1500Denali2005
GMCYukon XL 1500Denali2006
GMCYukon XL 1500SL2006
GMCYukon XL 1500SLE2002
GMCYukon XL 1500SLE2003
GMCYukon XL 1500SLE2004
GMCYukon XL 1500SLE2005
GMCYukon XL 1500SLE2006
GMCYukon XL 1500SLT2002
GMCYukon XL 1500SLT2003
GMCYukon XL 1500SLT2004
GMCYukon XL 1500SLT2005
GMCYukon XL 1500SLT2006
GMCYukon XL 2500SLE2000
GMCYukon XL 2500SLE2001
GMCYukon XL 2500SLE2002
GMCYukon XL 2500SLE2003
GMCYukon XL 2500SLE2004
GMCYukon XL 2500SLE2005
GMCYukon XL 2500SLE2006
GMCYukon XL 2500SLT2000
GMCYukon XL 2500SLT2001
GMCYukon XL 2500SLT2002
GMCYukon XL 2500SLT2003
GMCYukon XL 2500SLT2004
GMCYukon XL 2500SLT2005
GMCYukon XL 2500SLT2006