Quote:
Originally Posted by SouthArk370Z
All a resonator does is, well, resonate. It does not affect emissions. As a rule-of-thumb, any mods downstream of the catalytic converter are OK. But you need to check local laws to make sure.
As far as warranties; what kind of warranty do you have on a 2009 model vehicle?
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Like @SouthArk370Z said. If you have cat-back only and left headers and cats alone then you’ll be fine. Resonator delete just adds noise. Personally, I run long-tube headers and full non-resonated, no-cat exhaust from Fast Intentions and it’s loud and smells like fuel but I still pass emissions test in GA due to the sensors location. This will depend by exhaust and state emissions. I wouldn’t try this in California.
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