I had tried everything to get rid of the 420 & 430 codes, but nothing worked on this car, so I took the chance and I had Kooks jig me up the front pipes with the Green cats. Swear to god, within 30 miles the codes were gone and have stayed off for 7 months now. Passed inspection in November with flying colors. A bit pricey though, around $650, but ya gotta do what ya gotta do.
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