I have H pipe with roush axle backs and love the sound. But I know it's going to be too loud with LTH and so I was going to have to go with a borla sport cat back. So I just didn't know if I wanted to do all that when my sound is great now. If the benefits were worth it then I would do it.
The benefits will be well worth it if you tune it on E85. At the very least, I would consider getting rid of the cat bodies for straight pipes. That won’t change the sound too much more than what it is currently. Have you dyno’d the car yet? My car made 469 rwhp/434 rwtq with catted LTHs, a Steeda x-pipe and factory Active Exhaust. Yes, it was loud, but not as loud as some of the non catted cars I’ve heard. Now I have a Steeda axle back and that bumped up the sound a little more, but in a good way.
5-7 hp.
True, shorties are a waste of dollars. Don't change headers unless you go with LTH.
Dollar per hp gained LTH are at the very bottom of the list, like Titanic bottom.
If not, you could cut the cats out of the mid-pipe and have a piece of straight pipe welded in. If you ever decided to go back to cats, just reverse that procedure.
