I have used Magnaflow cats on a few different applications. A street/strip cars (L67 powered Grand Prix) that I helped build with a friend as well as a few on work trucks of my dad's. All worked good and didn't really have any problems that were the fault of the cat.

You typically will not get the service life out of an aftermarket catalytic converter that you will out of the OEM, but that is why they are cheaper. Provided that they do not rust out and the engine is kept in proper operating condition, most OEM cats can last longer than the rest of the vehicle.

 

Yeah, it's not so much the life of the cat, it's just that I wanna know if the high flow cat changes the sound of the exhaust at all. I'd like to open up the sound a bit more.

 

headers would be the best for that...

 

well when i originally only had on my v-force muffler it sounded ok, but my cat was toast.....so I took it out and I'd say it nearly doubled in loudness.....

 

Yeah, only it's illegal to not have them. I wish it wasn't, because I'd be running dual straight pipes.

 

It's not really enforced here where I am.

 

will the brand of cat make any difference in sound or is a high flow cat a high flow cat no matter how you look at it... like will catco or magnaflow or dynomax, etc.. sound any different say with flowmaster 40 series duals?? also, what can you do about your oxygen sensor so it doesnt throw a code causing the SES light to come on??

 

they stick in what they called an O2 simulator....you only need 1 anyway....

 

where do you get the simulator??

 

IIRC, sticking an O2 simulator in is only legal for off-road use here in the US and will not pass inspection.