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Ships within 48 hours · Estimated delivery Aug 2 - Aug 7
L76 and L77
The shaft diameter is smaller than the OEM plastic barbell to minimize flow restriction
Includes fitting kit
Tensioner Pulley (Steel) Oct 2006 - Aug 2012
Idler Pulley (Steel) Dec 2000 - Sep 2002
57S-4521 K&N Cold Air Intake Kit, 2012 - 2020 Holden Colorado/ TrailBlazer 2.8L L4 dw300 L76 and L77OVERVIEW The K&N Performance Airbox is designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. Replacing the restrictive factory air filter and air box allows your engine to inhale more air than with the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. A fully enclosed injection molded air box connects to the factory air intake hose. The removable
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