Review on 🏎️ K&N Cold Air Intake Kit: Boost Horsepower and Performance 50-State Legal (1996-1998 CHEVROLET/GMC C1500/K1500) - Model 57-3039 by Mike Fedd

this fixes my code P0420. every 2 or 3 months my code appears. I replace the inlet and outlet O2 sensor. Checked the catalytic converter, everything is fine. 3 months later CES issues a P0420 so I did an intake smoke test. and I found that the breather adapter o-ring was leaking and unclassified air was entering the motor. You cannot buy this adapter or o-ring, it is no longer offered by the dealer. So K&N 57-3039 FIPK solves my problem. My engine can't get a meter more air. LARGE AIR INTAKE KIT