I failed emissions and I think it is my cat.

Will a magnaflow do the trick, or is it too high flowing?

Anyone have first hand experience??

 

better off getting a regular car, the key to catalytic converter efficiency is to get that thing as hot as possible. the magnaflow doesnt have enough backpressure to create heat.

That doesnt mean the maganflow one wont pass, the stock replacements have a better chance.

 

The magnaflow will work fine for a smog check. Just drive the car around a while to get it nice and hot. The problems I've had with them, is they generally don't last too long.

I got my car smogged in October of 2004, and then in 2006, my cat was dead.
Can't really beat it for $50 every 2 years, though.

 

The magnaflow "OE" cat will work very well for both emissions and flow just by virtue of being new. The internal design is somewhat improved over stock anyway, since there are no forward-facing "lips" inside it.

With a 2-month-old Magnaflow OE, the original O2 sensor, an oil change, retarded timing, and some 6-month old spark plugs, my d16a6 put out less than 1/10th of the allowable limits for emissions in Austin. The emissions were on par with a brand new car.

 

my magnaflow cat lasted 4 months then the whole inside melted. I still use ith though