07cobaltss

DC SPORTS Catback Exhaust, how big is it? doesnt say in any description i've found. and is this exhaust any good?

intense_SS

i believe it is 2.5 inch!! but maybe im wrong..and ur from fort wayne?? u know where saint john is?

07cobaltss

yeah your not to far away. hey what do you think about running 3'' all the way back? cuase i already have a 3'' dp and CA header. or should i just get a 2.5'' cat back?

HackAbuse

3" would be good if you had some 300whp mods, do you plan on it?

07cobaltss

well here are my mods i have in mind, gmpp stage 2, CA heat exchanger, the full exhaust, intake, and maybe meth... would that get me around 300?

HackAbuse

Maybe if you had a 2.6" pulley, 60# injectors and a tune, but right now i don't think you're quite cutting it

intense_SS

run 3" dude it will be fine but dont buy an exhaust just go to a local exhaust shop and have them make you a custom catback all you need to do is buy the muffler(magnaflow) and your set..will save you like 350-400 bucks

07cobaltss

well i was jsut going to go with vibrant cat back is that an ok setup, CA header, 3'' dp with high flow cat,and then the 3'' vibrant cat back?

intense_SS

no dude thats a waste of money..u will see the same power and better sound out of a custom made one

07cobaltss

but a 3'' exhaust wont mess up my torque curve to much right now? i should still see some good numbers over stock right?

yellowcobaltss05

2.5" and you dont need 3" exhaust for 300whp on our cars bc we are NOT turbo

OniMirage

2.25 would be good up to over 300hp and a 2.5 should be fine for up to 500hp after that you can dip into a 3" there was a chart posted earlier lemme see if I can find it

07cobaltss

so then a 3'' dp with a 2.5 out the back?

well if i go with the gmpp where do i go to get a decent tip?

OniMirage

you should just drop the idea of a 3". keep all of your torque and gain a bit more plus gain a good amount of hp in return, this is the image posted earlier in a different exhaust thread

07cobaltss

ok well i already have the 3'' dp with high flow cat. and this chart isnt just for the LSJ motor. this is an overall chart. some vehicals dont need a whole lot of back pressure because they are not EGR.

OniMirage

its a better idea of what to expect though. if your ready to spend some dough a 3" would be a good way to spend a good chuck of change

07cobaltss

so then i should just get the gmpp and use the 3'' dp? if i do that where do i get a good tip?

but the vibrant cat back is cheaper than the magnaflow and the vibrant is a 3''? so would i see a positive gain, or would i be lossing power... any gain over stock is good, i jsut dont want to lose anything.

so i guess what i'm asking is here is two things i can do. i can get the vibrant cat back and go 3'' from header dp back, or i can run a 3'' dp and go to a 2.5'' cat back.

OniMirage

the gm tips are good quality







http://www.crateenginedepot.com/stor...tems-C146.aspx

07cobaltss

ok but what should i do? the 3'' all the way back. or the 3'' dp to the 2.5'' cat back? either one i can do, if i go 3'' it will be vibrant, if i go 2.5 it will be gmpp.

OniMirage

the gmpp is not 2.5 its 2.25. your choice should be based on where you will eventually be as your go on and keep modding. if you do a sc'er swap maybe a 3 would be good just to mate up to the 3" dp

07cobaltss

ok so i'm going to go with the gmpp 2.25'' cat back and mate it up to the 3'' dp, shouldnt be to big of a problem, the 3'' can mate with 2.25''. and my back pressure shouldnt be a problem right, since i'm bringing the 3'' down to a 2.25?

OniMirage

it should work fine when you get off the gas I can just imagine how the exhaust note will be very throaty im guessin

07cobaltss

i'm cool with that =)

hey onimirage thanks alot for all your help!!! i really appreciate it!

OniMirage

give us a video when your done would like to hear how it sounds

βКˉSuPerCharged

Dude, you asked the same question 5 times. Forget the 3" exhaust, you won't see **** for gains, its overkill. the LSJ is not a 454,