Thread: Magnaflow Cat

Hey, I recently had speed daddy headers installed on my car, and now i need to put a Cat on it for inspection next month. Would the cat below fit the headers? it looks like i would need a cat with a 3inch inlet/outlet.

(headers)
PONTIAC GRAND PRIX GTP 97-08 3.8L RACING HEADER/EXHAUST | eBay

(Cat)
MagnaFlow Ceramic 53000 Series Catalytic Converters - 04EXH - PFYC.com

Originally Posted by bluegtp91

Just buy a 3" in/out converter and bolt it in place of the straight pipe before it bolts up to your catback.

Also, buy a 3" converter from EBay...because PFYC is expensive as hell.

Thanks for the fast response. I did look on Ebay and all that i found where the high flow cats that are over $100 and one bullet cat that was close to $100 so surprisingly pfyc was cheaper. Arent the only ones that bolt on are the high flow cats? like the one below. If thats the case i would really just prefer the bullet cat since i want to keep the cat on the car. Do you have a cat that u prefer? Sorry if i sound kinda slow about this subject but i don't know a lot about cats at all.

http://cgi.ebay.com/ebaymotors/ws/eB...m=260650801610

Does it need to DO anything?

If not.... Frozen boost has a "non-cat" for less money.

Interesting i have never heard of a non cat. What does it do? will it clean the emissions? Will it make the car a little quieter i don't really like the huge grumble/raspsy sound it makes now. Which i think it makes that noise because i have an exhaust leak, and i am hoping that welding on a cat will solve that issue. Also is there any gains? or will it rob the gains since a "non-cat" is going back on?

its a pipe with a cat body welded to it.

Doesnt do a thing for emissions.

Originally Posted by GtpKo

What about the 99009HM? $90-ish

Where is that from?

Originally Posted by matt5112

its a pipe with a cat body welded to it.

Doesnt do a thing for emissions.

Ah i need an actual cat to pass inspection coming up. I was happy to about spending less money.

99009HM would work.

Or the metallic equivalent.

Hotexhaust.com

or amazon.com should have them.

Okay great. Thanks a lot for all the info and help peeps.

One more question. So the one below would fit? i am just a little skeptical because of how long it is. I guess it dosent matter since it is being welded on?

MagnaFlow Ceramic 53000 Series Catalytic Converters - 04EXH - PFYC.com

I'd opt for one of the HM series because most of the other ones supposedly don't do so well for emissions.

Sort of a "throw it on and I'll need a new one next time around" cat.

When i looked up the 99009HM series on the fit guide did not show the grand prix. Or does that not matter since it is going on after market headers? Also it states that it is non-carb complient. What does that mean?

http://www.amazon.com/dp/B001HMAZ32/...SIN=B001HMAZ32

to be carb compliant it needs to be designed for that vehicle alone.

It wont matter because its for aftermarket exhaust.

Okay great thanks again. Placing order as we speak lol.

Originally Posted by misterman

Interesting i have never heard of a non cat. What does it do? will it clean the emissions? Will it make the car a little quieter i don't really like the huge grumble/raspsy sound it makes now. Which i think it makes that noise because i have an exhaust leak, and i am hoping that welding on a cat will solve that issue. Also is there any gains? or will it rob the gains since a "non-cat" is going back on?

Originally Posted by matt5112

Does it need to DO anything?

If not.... Frozen boost has a "non-cat" for less money.

Will this also help with the grumble/raspsy sound it makes? Cause mine doesn't have a CAT either.

I was under the impression the rest of your catback would be the cause of that.