Jeep_junkie

Honeycomb inside the cat had worked loose and was breaking up and rattling in there so I had it replaced with an ORP. The car is now loud as hell and worse, raspy on deceleration . Doesn't help much either that the right side tail pipe is basically free flow since the single in/out flowmaster needed a slight modification to work with dual tailpipes. Now I'm thinking about getting a high-flow cat reinstalled ASAP. Anyone else regret going catless?

DoingBadThingsIsFun

I went catless on my gsx it wasn't so bad (i had a 3" 02 hoursing back with no mufflers) no cat always sounds raspy...

Puck

iTrader: (17)

No cats with my x-pipe and magnaflow TDs is not raspy at all.

Its loud as hell, but the deep bass note loud that you feel in your chest and sets off alarms .

ss.slp.ls1

iTrader: (36)

Just live with it. If not, just pick up some high flow cats and weld them inside the y-pipe.

joelster

Your car is most likely not tuned at all. The raspiness will go down A LOT after you get the car tuned (leaned out). It won't cure it totally, but it will sound better.

Ihasfip

iTrader: (5)

I think maybe it is your choice of muffler that is making it sound so raspy. My SLP LM1 sounded like that. It got ditched promptly. Now with an X-pipe and bullets it sounds good and has no rasp or crackle on deceleration. It used to sound like a redneck farm truck. Good luck.

D

myltwon

iTrader: (1)

any aftermarket exhaust on a stock tune lt1 will always be "poppy" and "raspy" especially with stock manifolds

Z28Camaro01

iTrader: (6)

I went catless for a little while then got tired of the smell and sound so I went with magnaflow cats. That was all before my H/c swap and now I couldnt imagine how loud it'd be without cats lol. Oh and this is through my magnaflow catback.

twelver12

iTrader: (3)

if your car is a daily driver you probably want cats, also unless you have deleted your 02 sensors you need cats. your 02 sensors need to get up to around 600 degrees so your computer will enter closed loop, this wont always happen with ORY pipes and while you think your gaining performance you really are just losing a little along with some gas mileage, not to mention if you have emissions checks you will fail miserably

Formula350

iTrader: (3)

Throw in a cherry bomb in it's place or a 3 to 3.5" Magnaflow race muffler (bullet). It'll work like a resonator and cut down on that rasp and pops. Best use bigger than what you have for exhaust though or else with the added back pressure of it, it'll do it job as a glasspack/muffler and alter the sound even more. Mind you, it wouldn't be raspy, but it could make it sound either too quiet or not as nice of tone as before. That's the ONLY thing keeping me from LTs or removing my cat.

WhitePhoenix99

iTrader: (12)

I love the way my car sounds without cats and a flowmaster. . it only pops a little on deceleration and sounds waaay meaner than before. Actually I wouldn't mind if it was a little louder, but that's just me

Black93_Formula

wut do you guys think my car would sound like with no cat? its stock exhaust except for a flowmaster muffler? would it be really raspy and poppy?

WhitePhoenix99

iTrader: (12)

I think you would like it

James Montigny

iTrader: (13)

Catless on a stock or bolt-on car does tend to be a bit raspy, expecially with stock manifolds or shorties.
Running a high-flow cat is the best option IMHO, and it's what I've done on two of my firebirds.

94LT1Bird

iTrader: (4)

i cut the cat out a couple months before i got lts....i was runnin a slp loud mouth 1 catback....it was loud...i liked the sound...

94Zstangwalker

iTrader: (1)

gotta love a little crackle in your exhaust... not too much however.

sweet-94z28

iTrader: (30)

Flowmasters and Magnaflows come alive on the LT1 with no cats.