i have the mpx sprial catted downpipe on my car and i was just wondering if i went with the catless how much louder would it be over the catted? cuz i have muffler delete and i dont think its any louder with the downpipe installed

 

i love my catless made such a difference.

 

over the catted downpipe? or just from stock? cuz i have the catted downpipe now and i was just wondering if its worth it to go catless or it doesnt matter

 

Try youtubing to get and idea for sound difference.....but I just went catless this weekend and love the sounds just a tad louder while cruising and but aggressive on the throttle...dont even want a catback now. Turbo spools really quicker as well

 

well heres the catted downpipe and the mpx catback

YouTube - ‪MPx 3 Inch Exhaust for Chevy Cobalt SS Turbo‬‏

and heres mine catless and mpx catback

YouTube - ‪Cobalt ss exhaust‬‏

i think its louder. if you can find someone to buy your catted one i would buy catless

 

i was gonna make a thread for this, but i may as well try here how does catless sound on an lsj? all i've got at the moment is a magnaflow muffler i believe, is catless super loud and raspy on an lsj or does it make it deeper... im fine with a little louder, but i hate rasp

also the reason is i wanna get a badmab and ZZP 3inch downpipe and catless is cheaper

 

Catless on an LSJ is loud...I mean LOUD. Back when my buddy had his SC, he had ZZP's header/DP combo with the GMPP Sport catback and that was crazy loud. Like we could hear him coming from many blocks away. As far as Rasp? Eh...not so much...just loud as all heck.

 

Hm that sucks... Oh well guess i'm gonna have to cough up the extra $60, i guess its close to $500 in the end anyway whats another 60 or so.....right

 

I went Catted, because our emissions up here are strict. However I read that ZZP Catted will fail emissions anyway because it's not EPA regulated or something.

Not sure how true that is, but if I fail, I'm gonna be sad. I'll sell my catted then if I fail and go catless. I still have my stock.

 

Ill go with the cat. Catless seems way to loud

 

nothing is too loud haha.

 

Catless isn't way too loud...it sounds awesome

Catless + JR side exit = louder

Catless + no res + no muffler on an lsj is just dumb loud

 

if its deep loud then yes
but if it rasp civic loud no...

 

well i dont want the civic rasp loud and my car now with muffler delete sounds almost the same with the catted as it did before maybe just a tiny bit more snap crackle and pop and some gurgling between shifts i have a side exit cut out with the stock muffler just hanging there its good enough i guess thanks

 

I went with the catted down pipe. I have had too many Mustangs without cats and was sick of smelling like fuel. It saturates your clothing.

 

my car on the autocross course.. stock exhaust w/ catless dp.. i love the sound.. crappy iphone video though

YouTube - ‪Autocross.MOV‬‏

YouTube - ‪Autocross 2.MOV‬‏

 

Are you spending excessive amounts of time standing behind your car while it's running or something?

 

I have catless with stock catback, its perfect. I should take a vid.

 

i was thinking the same thing

i mean it sure changes the smell, but i really like it lol. sure wouldnt make your clothes smell, cant even smell it in my car unless im stopped.

 

just get a catted downpipe with a cutout and call it a day.have it nice and quiet when cruisin and loud when u need more power.simple..

 

For some reason, everytime someone dyno's with their cutout open on this car, they either lose wheel HP or dont make any more than they did with it closed.

 

I didint know that.Im new to cobalts and i thought it would help since my srt put down more trq and whp when was open.single digit number on that small snail but still helped.Only thing i didnt like was i lost some low end tq but gained some on top.

Can You explain how does that happen..

 

Catted or cattless depends solely on age. If you're under the age of 24, go catless. If you're 25 or older, go catted.

 

I have 07 s/c and looking to get zzp catless downpipe but I'm having a hard time understanding the 2nd 02 bung for the wideband, do I need to get the 2nd bung or no? I guess I just don't understand the wideband part. I know wrong engine but figured I could still get help

 

When i went cattless I couldn't believe how much the dual cats muffled the exhaust on these cars . Even with the rest of the exhaust system in place the car sounds real aggresive at WOT......whats cool is it's really mellow at idle and part throttle cruising . If you mash on it ....then let off and pull into a parking lot or something .....people would wonder where that loud car went. hehe

It's almost like GM used the cats to muffle the car and put a high flow muffler and resonator on the stock catback lol.