I did the swap a few years back on mine. Pretty straight forward, except that I used the Gas-N side pipes instead of the FFR pipes. I did have to use a few shims to move the pipes outward more from the body, but that's easy to do. Nothing to it.
FFR 3489. 372w, 750 Mighty Demon, Paxton 1200, Festiva booster..
475rwhp and 431rwtq at 5lbs of boost...Now running 12lbs of boost.
If it was me I'd keep what you've got and fix the problem areas. You've already done the fitment drill so taking them down and putting them back up is a snap. That won't be the case switching to the FFR stuff. Especially considering the current problems people are having with mis-alignment. They're much worse than the Kook's ever were to fit. Plus, the Kook's are a better design with better collectors.
I just replaced the mufflers on my Tri-States/Kooks (hated the augers) and it was super easy.
I am looking to replace my FFR pipes for something quieter and better quality. I haven't seen anything about these side pipes you are talking about.
1 of 2 Panoz built Challenge Car, FFR4327SP, Dart Iron Eagle 427, Victor Jr. intake, Victor Jr. heads, AED prepped road race 750,Tremec 600, Levy spec'ed cam, 500 rwhp, 500 rwtq, 3:27/ 8.8
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