zeus86

hey guys i have just got the flowmaster american thunder serise cat back system for my 99 gt with the 40 series mufflers i was woundering what mid pipe set up i should go with to try and keep the sound of the flowmasters so i don't get that loud raspy sound like the slp systems and what headers to go with some ppl say to go shortys so that you don't hit on speed bumps and things like that and others say just go with lt headers

uberstang1

Shorties aren't even worth the hassle of the pita install, either longtubes or leave it alone. Id pick up a high flow catted H pipe, or an offroad H depending on how loud you wan't it.

mrtstang

IMO, it's really hard to beat long tubes, o/r h, and flowmaster 40's or 44's. It's not overly loud, not raspy, and just has a great overall tone in general.

Also, do the long tubes or don't do at all. Shorties just aren't worth the hassle IMO. You will be fine over speed bumps and such even if you are lowered a bit. If your ride is really slammed you will need to exercise some caution, but it's not something that can't be dealt with. It is so worth it...trust me.

zeus86

Thanks guys for the imput on that the system i do have coming on monday is the flowmaster catback system with the 40 series mufflers i was looking at the h pipe from bbk or the x pipe system from bbk with the high flow cats to go with them for around $300 which is better to go with h pipe or x pipe i have heard good on both

mrtstang

With the flows i much prefer a o/r h. Even a catted h will sound great, but it would be too quiet for me. That's just my personal preference.

chasen1982

I am in the middle of putting on a UPR o/r xpipe on mine now.. the price is better then BBK and ive heard they are just as good. http://www.uprproducts.com/mustang-exhaust.html

TRUEBLUE3934

As mentioned above, it is not worth the trouble to install shorty headers. Not enough gain to make it worth the trouble. Do long tubes or leave the stock manifolds on.

The MAC ProChamber mid-pipes are nice! They are kind of in-between an O/R X and O/R H pipe. An O/R X with Flowmasters will absolutely be raspy.

Matt22088

shorties are not worth it on a stock engine, but very much worth it with mods. Don't let people tell you otherwise...

zeus86

Well i do intend on doing mod's as well. Just over a period of time. thanks guys for your imput