Any differences besides one is alot cheaper than the other?
I hear aftermarkets dont last as long as OEM. But what about when it comes to passing emissions?

Are they as efficient at lowering HCs?
Im thinking of going with MagnaFlow on a stock exhaust on a Civic EX

 

Anyone?

 

My 91 Civic failed emissions in 2008. I put a Magnaflow direct fit on it and the Civic passed with flying colors. Six months later in another state, it failed again. I could not get it to pass emissions despite much troubleshooting.