57-3057) that is street legal in all 50 US states for the 2500 and 2400 series of the 2005, 2006 and 2007 diesel GMC Sierra and diesel Chevrolet Silverado. See the complete applications list below. K&N dynamometer testing shows a 22.09 horsepower gain at 2860 rpm.
57-3057 K&N air intake system installed in 2006 Chevrolet Silverado 2500 HD
Dyno chart for 2006 Chevrolet Silverado 2500 HD with K&N air intake system
K&N was able to get the additional horsepower because the original factory intake tube and factory air filter were restrictive. The factory air box had a restrictive 90 degree bend. The K&N intake replaced the original airbox and filter with a bigger, smoother intake.
The K&N air intake has an oversized cone shaped air filter (RC-5139). The air intake system is free-flowing, which results in an immediate power gain. The specially designed heat shield also isolates the K&N air filter from engine heat.
The high flow technology invented by K&N and made in the USA provides the best balance of airflow and filtration. The RC-5139 is washable and reusable and can go up to 100,000 miles before cleaning is necessary.
It takes less than 90 minutes to install most K&N air intake kits with simple had tools. K&N air intake systems also come with the famous K&N Million Mile Limited Warranty.
Applications are as follows:
2007 GMC SIERRA 3500 CLASSIC 6.6L V8 DSL
2007 GMC SIERRA 2500 HD CLASSIC 6.6L V8 DSL
2007 CHEVROLET SILVERADO 3500 CLASSIC 6.6L V8 DSL
2007 CHEVROLET SILVERADO 2500 HD CLASSIC 6.6L V8 DSL
2006 GMC SIERRA 3500 6.6L V8 DSL
2006 GMC SIERRA 2500 HD 6.6L V8 DSL
2006 CHEVROLET SILVERADO 3500 6.6L V8 DSL
2006 CHEVROLET SILVERADO 2500 HD 6.6L V8 DSL
2005 GMC SIERRA 3500 6.6L V8 DSL
2005 GMC SIERRA 2500 HD 6.6L V8 DSL
2005 CHEVROLET SILVERADO 3500 6.6L V8 DSL
2005 CHEVROLET SILVERADO 2500 HD 6.6L V8 DSL
Find K&N products for your vehicle using the K&N application search then use the K&N dealer search to find a K&N dealer in your part of the world.