Caiman

I just removed my mid muffler. How would it sound to remove the 3rd cat?
Anyone done this?

(i searched, but found nothing)

D's Up

I'm also curious to see how this sounds and does deleting your mid muffler increase performance at all or is it strictly for noise? lol. I want to do it anyway, but any performance boost would be a plus. Did you notice that much of a difference in the exhaust tone when you deleted the mid muffler vs stock? I've heard it gets deeper like a G35ish tone.

Caiman

Yeah, it sounds a lot better. Im hesitant on cutting out the 3rd cat because I like the sound so much right now.
Its barely noticeable at idle, but from about 2600-3200rpms it sounds amazing.

tl2slow

iTrader: (5)

get a test pipe which is pretty cheap and try it out...if you dont like the sound you csan put back the stock 3rd cat....it will sound very nice from what i remember....

NAiL05

It will be a slight lower growl and a bit louder. Sounds pretty good. I am going to do it to mine soon. I have the comptech but gonna take out the third cat just cuz i can lol.

Caiman

alright i think ill do it friday.
it wont get a ricey tone will it? thats what i want to avoid at all costs.

NAiL05

If you pull out the resonator you risk gettin a rasp. The mid muffler also does a good job of toning down rasp but the resonator is the main part that cancels it out.

alexSU

iTrader: (3)

It sounds really nice! I had that done a while back. Just keep the resonator on so you don't get all the rasp .

myron

iTrader: (4)

what's the highway driving with the mid-mufler removed like? Is there drone or anything like that? I wanna do this but I do alot of highway driving and drone would drive me insane

alexSU

iTrader: (3)

I removed the resonator (no cat, no mid-muffler, no resonator) and there is a bit of drone at highway speeds. I imagine it's very very mild when you still have the resonator.

Caiman

yeah, with the mid muffler removed, there is no drone on the highway.
will there be much after the 3rd cat delete?

alexSU

iTrader: (3)

Yes, you will have some drone. It doesn't annoy me but then again I don't drive on the highway that much.

Caiman

hmmm...i think i might just keep the 3rd cat and add a CAI later

alexSU

iTrader: (3)

You can take it out if you have your stock resonator, I don't think you'll have any drone.

TL black

I have the race pipe and no third muffler and no drone at all it sounds great.The race pipe from rv6 is like 65 bucks and is worse it.

03TL_S

chopping the 3rd cat off friday...=)

Caiman

yep, im doing it too! im anxious to hear how it turns out!

03TL_S

DONE! Cut the 3rd cat and the resonator (the long tube looking part) but kept the mid muffler before the 2 real mufflers..SOUNDS subtle but AWESOME. Especially around 3 grand. I am supercharged...and it feels livelier...but it could be in my head.
I wonder if i grabbed 1 hp or 2.....

hp1kw

I'm surprised you can hear it over the whine from the supercharger. I have a supercharger installed and the Excelrate exhaust When I'm "on it" I hear the exhaust first until 3k -4k then all supercharger.

Edit: All of these "pre-cat" deletes will prevent the car from passing smog in Cali correct?

03TL_S

yea its subtle, but i can notice it. I feel like the car is zippier tho. am I crazy?

worldon1finger

I dont think your crazy. By getting rid of the 3rd cat you got rid of the partial bottle neck that you had in your car.

Caiman

Just got it done. one word...AWESOME!

03TL_S

anyone dynoed these results in the past?

Caiman

I doubt it would be much of a gain. With the added CAI, i bet i gained about 4 hp

03TL_S

last night it was 39 degrees her in jacksonville and MAN she was SCREEAMIN. i know the cold makes a world of difference, but i can feel it with this mod.