and as far as FI vs stock CBE is concerned, I don't think their design is very similar at all. The stock system is a Y-pipe, has a lot more bends and weighs considerably more.

I have the FI lth's with the 12" resonators. There is some drone around 2500 rpm. The 18" resonators take most of it alway. The FI CBE is a true dual exhaust.

That's where my FI got drone was at 2500 rpm

KC at Tig Welding Creations

1. True

2. You can't run cats in the factory location on a boosted car and expect them to last so he needed to get rid of the cats anyway. Even superchargers will destroy them in the factory location. I ran 100 cell mil spec cats in my lead pipes. My HKS Hi Power exhaust with Art pipes was super quiet and didn't rob the car of power. When it was on the dyno, we ran it uncorked because I thought I was getting an exhaust restriction. It only gained 10whp uncorked

It's a single merge and is more than enough for any N/A or mild boost application. Keep in mind oem header design have an output of 2.25"

But I do agree, F.I. is probably the best flowing exhaust on the market.

Its not that I expect/want to become a Tesla, but looking for options to reduce noise without MAJOR loss of performance. I understand that adding resonators etc will decrease HP. Just looking for the best way to do it…

I had a similar issue when I got my car. It had a resonated catless downpipe. Man, it was loud and I could not take it. Put the stock cats back on, much more manageable. Can you try putting the stock cats back on and giving it a try?

Will try to add resonators first, if not, plan b and will look for cats

I have the Greddy Evolution GT dual exhaust with motordyne Art pipes. Sounds great but is fairly loud and does drone at 3K rpm in my car.

Looks like their next batch isn't until March :excited:

thank you for that. That one becomes 3 in duals at the end which is why they're louder im guessing.

It drones even with the supercharger?

Yes.