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Guys:

I'm looking at adding Magnaflow mids to complete my exhaust set-up as my next modification.

My question is what difference (if any) does running a straight pipe (PN# 16422) make vs. with cats? (PN# 16421)

Thanks very much for any input.
 

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Its my understanding that both are considered off road but the one with converters might be more environmentally friendly (at least that's what the site says)... Also i bet with the cats that you wont through a code, but i could be wrong.

Also depends on your states emission laws.
 
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