forced_induction

Just wanna make sure that the ZZP header/downpipe combo will work with my corsa touring exhaust. Corsa is 2.5inch i believe so if i go with the 2.5 downpipe it will all bolt up rite?

Mike

Both their 3" and 2.5" downpipes will work, as long as you select the 2.5" bolt-in exit.

Jimmys2007CobaltSS/C

iTrader: (1)

yea it work i have the megan catback which is 2.5 as well bolts right up..with the 2.5 exit

forced_induction

alright just wanted to make sure. I got the GMPP exhaust manifold with the stock down pipe bolted up to my corsa now which isn't doing much for me i think. so i think swapping out for the ZZP combo will liven things up a little. Thanks guys

forced_induction

What do you guys think, 1 3/4 header or 1 1/2 header? Its only $20 more for the 1 3/4. I made about 270whp with stock exhaust, which should i get?

Mike

From everything I've heard, the 1 3/4" primaries are the way to go for us.

forced_induction

does the 1/4 inch really make that much of a difference. i know my GMPP manifold and stock dp are holding the car back, so im just trying to liven things up. its only $20 more for the 1 3/4 over the 1 1/2 so i might as well get the bigger header. Any down sides to the larger header?

tkaugh29

i have the zzp combo on, hooked up to the GMPP sport exhuast. I have the 2.5DP and my header has the 1.5 primairies. sounds great and fit perfectly.

edit: forced_induction, what are you mods? you say you made 270WHP, im curious to what your mods are.

forced_induction

ZZP 2.7 pulley, NKG 1 step colder plugs, 60 pound fuel injectors, Injen CAI, Corsa touring exhaust, GMPP exhaust manifold, Tuned By Matt at Tune Time, Dynoed 270whp 230tq without exhaust

tkaugh29

nice. i should be about the same then, maybe a little less.

i have stage2 w/ 2.9pulley, K&N CAi, gmpp sport exhaust, zzp header/dp, picking up plugs.

ColeJJones

lol, dude it will fit up perfectly. i had the same problem... did you even search this?? i had a few problems but nothing big. i freaked out cause i thought it wasnt long enough but i just had to pull on the exhaust. haahha

Jimmys2007CobaltSS/C

iTrader: (1)

thats a fast balt...add a downpipe/header 280 whp im assuming

Onyxd04Redline

1 3/4th Header with a 3" DP is the way to go.

ColeJJones

HERE YOU GO. I SEARCHED FOR YOU

https://www.cobaltss.net/forums/problems-service-maintenance-69/zzp-header-dp-corsa-exhaust-problem-89202/

D4u2s0t

do NOT get the 1.5", that's too small. get the 1 3/4".

forced_induction

yea i know better to post without searching **** on this forum lol, and yea i came across and actually read your whole install thread, but im the kinda guy who likes to make sure everything will work before i start something lol.
thanks, it should more than that actually, the day i got dynoed it was will all stock exhaust and about 100 degrees and humid as all hell outside
i was gonna get the 2.5in DP since my corsa cat back is 2.5in. Im still pretty new to all of this, its my first car i have modded so bare with me lol. Wont it bottle neck?
thanks bro, didn't realize it would make that much of a difference

tkaugh29

works perfectly on mine

Onyxd04Redline

Forced,

No it won't bottleneck. Just order the 3" downpipe with a 2.5" connection for your catback Everyone with an LSJ runs a 3" dp on this forum. Going with a 2.5" is a waste and will just rob you of power.

Just imagine how much more power you'd make with the bigger header. The LSJ should NEVER be ordered with less then 1 3/4th

D4u2s0t

yea, it works fine. but, it's too small and you're not getting as much power as you would with the bigger primaries.

forced_induction

alrite will do then, thanks bro

Onyxd04Redline

Not a problem

tkaugh29

well in that case why doesnt everyone have 12'' primaires then?