Shackleford

iTrader: (12)

I'm not sure if my cats are bad, but my car has 146K miles on it. How long do the Magnaflow high-flow cats last? Should I get a couple of them or would it be a waste of money?

http://cgi.ebay.com/ebaymotors/Magna...Q5fAccessories

RPM WS6

iTrader: (3)

What makes you think your cats are bad? Any symptoms or codes? Mileage alone doesn't mean they are bad.

Also, do you have a sniff test to pass? If not I'd probably just delete rather than replace.

Shackleford

iTrader: (12)

I don't. I'm just wondering if I should replace them because I have a lot of miles on the car.

NastyNate65

They dont need replaced just because of mileage, like stated above. If they are bad and they are making your check engine light come on, then they need to be replaced. Either keep driving on them or delete them completely

Shackleford

iTrader: (12)

Now, the cats are bad. Haha.

I'll probably go with this cat.

http://www.summitracing.com/parts/MPE-99009HM/

02CamZ28

iTrader: (30)

I wouldn't waste the money id take em off

Shackleford

iTrader: (12)

We have emissions. I'm not doing that.

Sales1@Texas-speed

If those particular cats will fit dimensionally I dont see a problem with using them at all.

Shackleford

iTrader: (12)

Well, the stock cat is 2.25". Since that one is 3" and universal, some welding adjustments would have to be made.

I put one of those on my old '95 Z28. I'm not sure how different the clearances are between the two.

hiram007

iTrader: (19)

I took the cats off on my 99 WS6 about 8 years ago and I also live in Houston. But I wanted it to be that way, less restriction = more power, not to mention it is one less thing to go wrong and I liked the sound. Just better off to be honest. (yes we have to get an inspection yearly, doesn't mean you cant pass )

FiredUpZ28

You can tune out the rear 02s and pass if they dont do a visual. The 02 monitors will just come up "not supported". My wifes T/A passes with an ORY every time. Not thats its legal by any means, but we went with long tubes and I got an ORY for almost free so I couldn't pass it up.

Shackleford

iTrader: (12)

Is this stock cat 2.25" or 2.5"? The vehicle search lists 2.25" cats.

http://www.summitracing.com/parts/MPE-99105HM/

TransAmWS.6

Yes the exhaust is 2.25" from the cats back if I recall correctly.

Shackleford

iTrader: (12)

Hm. We put a 3" pipe outback to the muffler. It starts somewhere after the cats, maybe middle of the car.

Does it make sense to get a 2.5" or 3" even though the diameters don't match?

TransAmWS.6

You asking if it would make sense to get a 2.5" or 3" catalytic converter? If so, I personally don't think it would be worth it, it would probably fit and everything, but I would just go ahead and get the direct fit cat that's made for the stock application.

Shackleford

iTrader: (12)

The direct-fit is way too expensive. The damn thing is $200. If I get the universal, I'd probably get the 2.5".

http://www.summitracing.com/parts/MPE-23477/

TransAmWS.6

Ah ok, I gotcha. The 2.5" universal I'm thinking would work pretty good then, I don't see why it would create any issues if it bolts on like it's supposed to.

Also, how strict is emissions testing in Houston? I had the same problem with my Camaro this past summer and I just took my cats off completely. My car is modded very similar to yours, I run a Magnaflow Catback and stock manifolds. Car sounds quite good with the O/R Y I have to say. Just throwing that out there.

Shackleford

iTrader: (12)

The universal cat will require welding, but I can get a friend to install both for $100. I don't think a shop would be cheaper.

http://www.summitracing.com/parts/MPE-99006HM/

For the OBDII cars, they just hook up to the computer. It's not likely that a cop would look under the car to see if I have cats, but I'm okay with getting new ones so I don't worry about it. Haha.

Track_FC

iTrader: (2)

Don't pollute the environment by throwing on test pipes like some suggest. Get a legitimate high flow cat if you plan on changing the stock ones out.

I8UR4RD

iTrader: (16)

if you have a serious emission control system in your state, then sure. but other wise save the money and just add an ORY or something. itll smell like a sunoco on wheels.