holdon2em

Ok, so Ive had my '99 TA for about a year now, bought it second hand, runs great, but it needs new CATS. I don't want to just replace the CATS but the whole exhaust system from front to back....so from the front here's what I wanna do, let me know what you think and if you have any suggestions let me know.

In order from front to rear: Long tube headers, into electronic cutouts, into the High flow CATS, into resonators, twin pipes on each side in the back.

If this is off the wall or you have any suggestions please let me know. TY

Also if you have preferences on which parts to use over another let me know as well ty again.

Steve

94Z28-MSTGKLR

iTrader: (20)

Seems how this is your first post I'm going to say try a search. There are a bunch of people that have done custom stuff very similar to your discription if not exactly. Personally if your on a budget I'd just get a set of pacesetter coated headers (not stainless but reasonably priced and offer emissions if needed), tsp ory (unless you need cats, they offer those too) and a magnaflow or hooker catback. I have a cutout on my car now and I never use it. I think they're a waste. If money is not an issue, I'd do ARH (stainless), ARH ory (stainless and you can get cats and emissions stuff also), gmmg, and a tune. All the stuff on my car the previous owner did and is starting to rust and look horrible. The second setup I suggested is exactly what I'll be ordering in a few weeks. Just my .02.

itsslow98

iTrader: (18)

if you do the cutouts too close to the headers you will have no backpressure which will actually hurt you so you may want to put them after the cats and before the resonators.

Jon@Texas-Speed

iTrader: (18)

Check to see if you can get all that in there first. That's a lot of stuff to get put under one of these cars. Are you going to be fabbing it up or having someone else do it? If it is someone else, have them look at it and see what they think. I would back the cutouts off the headers just a bit to make sure you don't get any air across the O2 sensors but that could make it tough to get the cats inline. Are you wanting to run some kind of x-pipe on it?

Jon

RPM WS6

iTrader: (3)

I would forget about the cats unless you have a visual or sniff test to pass. Otherwise, they are dead weight, extra cost, and can only hurt power.

holdon2em

thought about getting rid of the cats, however I had a local exhaust tech in my home town tell me it's not such a good idea because it would make the car run rich and then mentioned something about O2 loops to trick the system into thinking there is a CAT there. I haven't heard of an O2 loop before and don't even know where to get one.

Ellsworth

just run open headers. thus no need to spend any extra money.

holdon2em

yeah your right about that thanks for the refresher on back pressure!

holdon2em

lol...I'd really like to but I live in an area with a lot of older folks and about as many cops, don't need no tickets on noise ordnance violation

RPM WS6

iTrader: (3)

Not if you get the car tuned. Whether you have cats or not, you should plan on getting a dyno tune after an LT header install for best results.

It's called an O2 sim (simulator). But you won't need that if you get a custom tune, they can turn the rear O2s off.

It might make the car feel a little more lazy on the low end, but so long as they are full length headers, cut-outs right after the collectors certainly would not hurt high rpm horsepower.

holdon2em

well as I'm planning this venture, and I do mean planning (that's why I'm picking brains here) I am keeping options on the table as I go and eliminating some over others. I appreciate the help on all this and all the input everyone is giving me.

Let's say I did wanna go with the O2 simulator (and TY for letting me know the correct terminology), where would I find such an animal?

94Z28-MSTGKLR

iTrader: (20)

You can get 02 simulators from just about any of the sponsors on this site. Check out their websites. Lots of good stuff.