Hey guys,
I want to install an h-pipe on my 99 gt and currently i have flowmaster catback exhaust and the rest of the exhaust is stock. i want to install an h-pipe with no cats, and i need to know everything i am going to need to purchase so it all goes smooth. i have emission testing so i need to pass the plug-in crap. i've heard about MIL eliminators but i have no clue what they are. Also, what pipe is the best to get(most bang for the buck) and if i get headers in the near future, what should i purchase(long or short)...if i plan on getting long, should i just save my money to get the longtubes and shorter h-pipe? Any advice is greatly appreciated.

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You wont pass emissions with an off-road H-pipe on. So if you emissions are coming up soon I would suggest you just wait till you have got them done then buy it, or if you can install the h-pipe yourself and then put the old one back on when you need to go in for emissions that would work fine too. When you install an off-road pipe your check engine light could and most likely will come on. MIL eliminators make it so that the check engine light doesnt show. I would go with BBK off road H-pipe I've heard they are very good. Headers I dont rly know about all I can tell you is that the best is Long tubes that are ceramic coated.

 

Unless you've got boost of some sort then shorties are fine, plus on the newer models like yours long tubes a pain to get in. I'd just go with shorties, equal-lenghts, that way you can go ahead and put in your new H now.

 

thanks for the suggestions guys. i'm going to be doing this myself, so if i purchase the bbk h-pipe, how many mil eliminators do i need and which brand is the best to get? thanks

 

Just one as far as I know and if you need more than one I'm pretty sure they sell them in pairs dont quote me on that though. I dont even think there are different brands.

 

hey Nick I went thrugh the same issues.. depending on wich state you are they may or may not do a visual inspection, you have to get the MIL's as soon as you get rid of the cats.. I got STEEDA and they work perfectly, I even pass gas emmisions test with them on!!!! but I was lucky that they didnt do a visual because if they did I would fail and also get in trouble for using non street legal parts.. My advice: Go to inspection first and then get the pipes....

 

thanks alot everyone. i think i have all the info i need for now to get my stang roaring. later guys

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if u go with no cats you can always save the stock and put it back on for inspections

 

I'd go nothing less than midlength headers. I've the Bassani on mine, & I love them. If you go long tubes...Hooker is my fav., but Kooks makes custom though they are more drag race oriented. BBK makes decent lt's, but I have 'never EVER' been a fan of MAC. If you get lt's, you have have to run a short 'h' pipe which will not fit cat's, but if you don't have a visual, just get some stuff (I forget what it's called, but it guarrentees you will pass emission or ur money back) in a red bottle. You can buy it at any autoparts store, just ask someone there about it. Bang for buck...look at the Mac Prochamber. I lean more towards quality though. I'd go w/the MRT h-pipe if I were you.

If you run midlengths like i did you can actually run cats. I bought the regular size Bassani x-pipe, & fitted the highflow cats no problem. I had to cut about 1.4in of the pipe to make it fit, but then had no problems. When I get some time, I think I am going to get under there again, & remove them & replace them w/the cat-eliminator pipes that came w/the setup to see how I like the O/R sound.

MIL eliminators are used to go in place of your O2 sensors when you run an o/r setup, so that you do not get a "Check Engine" light, & possibly eventual poorer performance out of your car. If you run an o/r setup, you will need them, or get a dynotune. Hope this helps.

 

Thanks again for all the help guys
Nick