aFe® 51-80092 - Stage 2 Si Cold Air Intake System with Pro DRY S Air Filter

4.51 reviews / Item # mpn668909
aFe® - Stage 2 Si Cold Air Intake System with Pro DRY S Air Filter
aFe® - Stage 2 Si Cold Air Intake System with Pro DRY S Air FilteraFe® - Stage 2 Si Cold Air Intake System with Pro DRY S Air Filter Installation InstructionaFe® - CatalogaFe® - Factory Tour Video 602x420aFe Authorized Dealer
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aFe Accessories

Stage 2 Si Cold Air Intake System with Pro DRY S Air Filter (51-80092) by aFe®. The aFe Stage 2 Si Cold Air Intake System replaces your entire factory air intake system with a large high-flow aFe Pro DRY S air filter, a totally enclosed airbox and a smoothly contoured, less restrictive intake tube. This system enables your engine to take in huge quantities of dense, cool, oxygen laden air. The result is better combustion, increased horsepower and torque, and a noticeable gain in performance.

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  • Improves airflow to your enginer
  • Isolates the air filter from engine heat, enabling it to take in cooler, denser air
  • Increases horsepower and torque, improves performance
  • Designed and tested for each specific application
  • Includes a conical high performance aFe Pro DRY S air filter; it never needs oiling
  • Includes a precision designed molded, sealed plastic airbox and plastic intake tube
  • Comes complete with everything required for installation, including comprehensive instructions
  • Can be installed in 45-90 minutes with simple hand tools; no drilling, cutting or fabrication required
  • Limited 2-year warranty
  • Proudly made in the USA

The Stage 2 Si Cold Air Intake System is for those who want a substantial performance gain with less intake noise and a stock appearance. It replaces your factory, restrictive air intake system with a massive aFe Pro DRY S air filter, a sealed plastic air box that isolates the filter from engine heat and quiets intake noise, and a rotomolded plastic intake tube with smooth bends for increased airflow volume. The increased flow of cooler air to your engine will result in noticeable gains in power and performance. Cooler, denser air contains more oxygen, and more oxygen in your engine's air intake charge means better combustion, resulting in greater engine output.

The Pro DRY S filter combines high airflow and filtration efficiency with the convenience of oil-free maintenance. It contains 2 layers of randomly porous synthetic fabric, which allows approximately twice the airflow when compared to a typical stock air filter. The increased airflow results in more horsepower and torque, better throttle response and more miles per gallon. But this improved airflow and performance hasn't been gained at the expense of engine protection. The Pro DRY S has an excellent 99.2% filtration efficiency rating.

The pleats in the filter are evenly spaced for greater dust holding capacity and the tips are rounded for better airflow. They're also 30% deeper than comparable aftermarket air filters for longer service intervals and greater dust holding capacity. The sealing surface and supporting structures are made from 100% polyurethane, to withstand extreme engine temperatures.

The one-piece sealed plastic airbox may install in the same location as the factory airbox, but there the similarity ends. The Stage 2 Si airbox is much larger inside in order to include the largest aFe Pro DRY S filter possible. The air box also features strategically located openings and scoops to ensure that only the coolest air is forced into the air filter for greater efficiency and performance. And enclosing the air filter also results in less intake noise. The Stage 2 Si airbox installs easily; no cutting or drilling is required, and it's attached with quality stainless steel hardware supplied with the kit.

A specially developed 3-angle velocity stack smoothes the airflow transition from the air filter to the rotomolded intake tube. The precision design and smooth contours of the intake tube maximize airflow volume and speed for optimum power gains. The intake tube also features a precision tuned MAF sensor pad, which will not affect engine performance or cause a CHECK ENGINE light.

The aFe Stage 2 Si Cold Air Intake System comes complete with everything necessary for installation, including comprehensive instructions. It's backed by aFe's limited 2-year warranty and made in the USA.

aFe® (Advanced Flow Engineering, Inc.) manufactures performance products for late model cars, light trucks and SUVs. The company was founded in 1999 with an initial concentration on high performance air filters. Since then, the company product line has broadened to include cold air intakes, fluid filters, exhaust systems, intake manifolds, intercoolers, programmers, differential covers, transmission pans and throttle body spacers. The team of engineers, machinists, production and sales people at aFe® have many years of experience in their respective positions, and together work to ensure they produce the best automotive products on the market.

Part Number:

Vehicle Fitment

This part is compatible with 55 vehicle(s)
Year Make Model Fitment Notes:
2007 Chevy Silverado
  • Old Body 4.8L / 5.3L / 6.0L GAS
2007 GMC Sierra
  • 1500 Old Body 4.8L / 5.3L / 6.0L
2006 Cadillac Escalade
2006 Chevy Avalanche
  • GAS
2006 Chevy Silverado
  • 4.8L / 5.3L / 6.0L
2006 Chevy Suburban
  • 6.0L
2006 Chevy Tahoe
  • GAS
2006 GMC Sierra
  • 4.8L / 5.3L / 6.0L
2006 GMC Yukon
  • 6.0L
2006 GMC Yukon Denali
2005 Cadillac Escalade
2005 Chevy Avalanche
  • GAS
2005 Chevy Silverado
  • 4.8L / 5.3L / 6.0L GAS
2005 Chevy Suburban
  • 6.0L
2005 Chevy Tahoe
  • GAS
2005 GMC Sierra
  • 4.8L / 5.3L / 6.0L GAS
2005 GMC Yukon
  • 6.0L
2005 GMC Yukon Denali
2004 Cadillac Escalade
2004 Chevy Avalanche
2004 Chevy Silverado
  • 4.8L / 5.3L / 6.0L GAS
2004 Chevy Suburban
  • 6.0L
2004 Chevy Tahoe
  • GAS
2004 GMC Sierra
  • 4.8L / 5.3L / 6.0L GAS
2004 GMC Yukon
  • 6.0L
2004 GMC Yukon Denali
2003 Cadillac Escalade
2003 Chevy Avalanche
2003 Chevy Silverado
  • 4.8L / 5.3L / 6.0L GAS
2003 Chevy Suburban
  • 6.0L
2003 Chevy Tahoe
  • GAS
2003 GMC Sierra
  • 4.8L / 5.3L GAS
2003 GMC Yukon
  • 6.0L
2003 GMC Yukon Denali
2002 Cadillac Escalade
2002 Chevy Avalanche
2002 Chevy Silverado
  • 4.8L / 5.3L GAS
2002 Chevy Suburban
  • 6.0L
2002 Chevy Tahoe
  • GAS
2002 GMC Sierra
  • 4.8L / 5.3L GAS
2002 GMC Yukon
  • 6.0L
2002 GMC Yukon Denali
2001 Chevy Silverado
  • 4.8L / 5.3L
2001 Chevy Suburban
  • 6.0L
2001 Chevy Tahoe
2001 GMC Sierra
  • 4.8L / 5.3L
2001 GMC Yukon
  • 6.0L
2001 GMC Yukon Denali
2000 Chevy Silverado
  • 4.8L / 5.3L
2000 Chevy Suburban
2000 Chevy Tahoe
  • 4.8L / 5.3L
2000 GMC Sierra
  • 4.8L / 5.3L
2000 GMC Yukon
1999 Chevy Silverado
  • 4.8L / 5.3L
1999 GMC Sierra
  • 4.8L / 5.3L
Show all vehicle fitments

Product Reviews


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aFe® - Stage 2 Si Cold Air Intake System with Pro DRY S Air Filter
aFe® 51-80092 - Stage 2 Si Cold Air Intake System with Pro DRY S Air Filter
Average Rating: 4.5 of 5
4.5 of 5
2006 GMC Sierra 5.3
aFe® 51-80092 - Stage 2 Si Cold Air Intake System with Pro DRY S Air Filter (4.8L / 5.3L / 6.0L)
Great intake, good price. I noticed in power stock I went 0 to 60 in 8.6, now I do a 8.3. Not bad for 350 bucks.
JPosted by (Grunthal, MB) /
2006 GMC Sierra
Was this review helpful for you? Yes4   people found this review helpful.
aFe® - Stage 2 Si Cold Air Intake System with Pro DRY S Air FilteraFe® 51-80092 - Stage 2 Si Cold Air Intake System...    $375.00
4.51 reviews
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