SpeedJunkies07LS

hey i was wondering if anyone knew what the ls sounds like with no cats and an exhaust of if its even possible

any help???

craigk_c19

i think there is a sensor on the cat so you cant completly lose it!! unless you want a CEL on all the time and the place wouldn't let me take the cat off

D4u2s0t

yes, it's very possible. and it will sound like absolute ****. you will get a very, very minimal increase in flow and in my opinion absolutely not worth it for a daily driven cobalt unless you want the car to sound as bad as possible.

SpeedJunkies07LS

true i heard a lot of **** about people takin em off and it sounden like **** but i didnt know if that was true or not to be honest will straight pipe hurt my valves at all some told me it will and some told it wont i dont know what to say to it because i had them for about a month an but my borla exhaust on ???

D4u2s0t

straight pipe will not hurt your valves. i wouldn't take any advice from whoever told you that.

YellowLT

I have a Gutted LSJ Cat, Header and magnaflow. It's loud. I have no way of getting Video though. Very Raspy, It's not crazy loud though.

SpeedJunkies07LS

really o yeah i forgot to add they were ricers hahaha forgot to say that those hondas tear valves out like its there job haha

G5 Rider

im catless on my 2.4l and it sounds and runs great very loud haha if your into that thing. i dont know if there is to much of a diff. for your application but i like it.

SpeedJunkies07LS

thanks

tru2nrtt777

iTrader: (1)

You can run catless with no cel if you get "o2 sensor simulators". It is illegal in all states and it is a felony for a shop to remove emissions-related things for you. If you do it yourself which is not hard to do at all, it is legal until you touch pavement. Then you just cant get caught, NC is an emissions state and it isnt hard at all to get around the laws here.

Oh and the valves... LMMFAO, kinda like V-TAK being just for show. CTE's like Hondas, Nissans, and Mitsubishis can Bend valves if the teeth on the timing belt slip and the piston slams into the valves, but you wont. Our timing belts slip and the engine either runs like **** or wont run at all with no valve or piston damage.

jimbos'ss

iTrader: (2)

we don't have timing belts, its a timing chain with tensioner system.

tru2nrtt777

iTrader: (1)

Really? cool, All the same though, if the chain breaks we still wont be SOL.

tsunam1

timing chain with tensioner system Seconded.....

Leave the cats, If you do header dp later get dp with high flow cats, but you will need to be putting more air in to benefit from more air out....

joeworkstoohard

on an LS, it would be a lot of noise, legal issues, and rigging for a small amount of power.

Jn2

iTrader: (1)

not worth the gain, the gain is very minimal, i think i saw a magazine cover this at one point, the over all diffrence from a high flow cat is minimal, i think straight pipe dyno'd 1hp more than the high flow

WhiteSSBalt

Word, same here. I have a CA header, XTC 2.5" de-cat downpipe and an ARK N2 cat-back, and I love the way it sounds. Very loud all the time, and somewhat raspy in the higher RPMs. I've gotten nothing but compliments on the way it sounds though, even from fellow Cobalt owners at the several past meets ive been to. So I guess im not the only one that likes the way a cat-less car sounds. My friends H22 swapped EK hatch, my roomates STI, and my former neighbor's '07 Focus all are cat-less too. Thats just how we roll.

joeworkstoohard

i'm putting a cat on mine, but if it ever clogs, i'm gonna ask the mfgr to just sent me catlessness.

firestorm

glad you approve, my man!
greyhound FTL.

SpeedJunkies07LS

ha thanks guys i wasnt really sure if no cats and straight pipe would hurt but i have exhaust on it now i had straight pipe on it the first month i got it so i didnt know if i fucked anything up or not good to know i cant haha