K&N 57S-4521 K&N 12-20 Holden Colorado L4-2.8L DSL Performance Air Intake SystemK&N 57S 4521 K&N 12 20 Holden Colorado L4 2. 8L DSL Performance Air Intake System 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
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K&N 57S-4521 K&N 12-20 Holden Colorado L4-2.8L DSL Performance Air Intake System