Just put the ST system on my 88 with the stock L98 350 engine. Has smooth bend pipes, new flange for front at cat. converter, aluminized pipes and muffler. Hangers fit up to factory frame mounts with no problem except for a rod hanger on passenger side that hit the heat shield, little massage fixed that pretty easy. Some tight fits but have a good half inch clearance everywhere. Front pipe is close to passenger side emergency brake cable, had to reposition it a little and tie it up higher to get away from the pipe, was probably too close to factory pipe but I didn't notice beforehand. Real nice sound, not loud but deep and good rumble at low rpms, dual 2 1/2 inch tailpipes exit in factory location. Fairly quiet on the road, no resonance, perfect for me. Got the whole kit at Jegs for about 170 bucks complete with clamps, all in one box. Hard to beat I think.

 

I assume it's 3" I-pipe and muffler inlet.

Thanks for the report.

 

No. Dynomax is weird and makes 2.75" pipe for the 350's.

 

I had some different problems with mine. but I love it. It sounds great. Just as you said, deep rumble, not loud. I think the hardware kit could have been better. They should have included new hardware to attach to the cat and the hangers too. IMO.

https://www.thirdgen.org/techbb2/sho...hreadid=226562

Got mine at Jeggy's too. For $250 bucks got a new cat and the cat back system. Can't beat that!