Cold Air Intake for GMC Sierra 1500 (1999-2006) 4.3L EngineEliminate Intake Restriction on the 1999 2006 GMC Sierra 1500 Vortec 4300 Who Its For: Designed specifically for GMC Sierra 1500 owners running the 4. 3L Vortec 4300 engine who want to improve throttle response and engine efficiency during daily driving or light duty towing. The Problem: The Vortec 4300 V6 is a workhorse, but the factory intake system is plagued by restrictive, corrugated plastic piping and a heavy, baffled air box designed more for
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Cold Air Intake for GMC Sierra 1500 (1999-2006) 4.3L Engine