I know I want my next mod(s) to be headers and DP, I want to complete my cars breathing ability, Brian (BriantheLion26) had a DP and heat exchanger over my mods at the track and killed me top end.

Now, like the title suggests. I have a GMPP Exhaust (Touring), which has 2.25 piping. The header and downpipe that looks to be the best is a mid-length header and dp combo from ZZP. That combo only comes as low as 3.0" piping with a 2.5 outlet feeding into the exhaust. Will this work? Brian has a ZZP DP and a GMPP Exhaust and hasn't had any problems.

So...

1> will it work, yes, no, or will it have problems... aka- is it a bad setup, are there better options, safer routes, etc?
2> what other header and dp recommendations can you make?


thanks.

HERE is a link for those who need to see it.

 

it'll work fine. i am doing the same thing as u. zzp with my gm performance cat-back

 

and you have the midlength header/dp combo or you're just running their 2.5" dp against a GMPP exhaust? Just curious because if you have the combo I'm curious how that is performing for you, Brian just had a DP.

 

no i dont have it i am ordering it but there was a thread about it and they said it will hook up just fine

 

and there are no problems with bottle-necking the exhaust or backpressure?

 

ya im buying the zzp downpipe as well but i thought with the gmpp exhaust we had to get a diffent outlet size for the downpipe like 3"? i guess that was wrong

 

i could be wrong but i dont think so. let me look for the thread

 

ok, i'd rather be sure. I'll search my ass off for another DP and header combination before I cause myself more head ache than it's worth.

bump

 

still looking for it bro

 

alright good deal.


where is everyone else at?


You know, if this was a thread about how my g/f wants to try women for a while and I'm not sure if I should be still be friends with her and try for a three way there would be over 20 pages on this already.

 

if the outlet for the downpipe is 2.5" and the gmpp exhaust is 2.25" i don't think it will bolt up.

 

I would get the heat exchanger first..

 

Well, see, I know it'll bolt up, because another member on here is running one of ZZP's DP's, but I can't seem to find any information on whether it's a good idea to run it. I don't know if i'll get too much backpressure and end up with less power, or if the exhaust will bottle neck and I won't get an adequate gain.

will the dp and header add more heat too? I don't plan on going any lower than the 2.9", can the H/e wait till after the header and dp?

 

It'll bolt up... I have the ZZP 2.5 dp with GMPP cat-back.

No... the Header & dp will alleviate some back pressure and lower overall cylinder temps; not IAT2 temps... you DO need a HE for that.

 

with the 2.9" you are still at the point where u dont need cooling mods, finish the exhaust. i cant find that damn thread.

 

The header/dp will drop heat because it will be able to get that exhaust out quicker and more effeciently but the heat exchanger will help a lot when your winding the **** out of your engine looking for that top speed. The engine gets heat soaked on the top end because shes working hard and the supercharger is spinning so fast. Cooling mods help a lot.

 

even bolting to a 2.25?, and you haven't had any problems?

 

oh wait i'm an idiot. doesn't the gmpp start out at 2.5" and then bottleneck down to 2.25"?

 

well thats what i have. ZZP 1 3/4'' header primarys, and then the 2.5'' dp to the GMP performance catback. i love it. just make sure you get the header ceramic coated, anything else is a waste of money.. imho

 

No... no problems. Even when I had the Cobalt Addiction 2.5" dp (which fell apart; go with ZZP for sure)... no problems.

The flanges hook up perfectly.

No. GMPP is 2.25" ALL the way.

STOCK is 2.5" and then bottlenecks down to 2.25". But the GMPP flows A LOT better.

 

yeah, I noticed my track times increasing in leaps toward the end of the day. And the other day we hit 70 here, and i'm running a 2.9, I've usually got around 17 or 18 psi, but I was back down to 15psi!!!

It's all good, thanks for the help. yeah I figure I can sacrafice a little longer since I'm not going any lower than a 2.9. Higher temps won't hit here for another month or so yet.

that'd be awesome if it did, but I'm pretty sure all the piping is 2.25

 

Nobody listens to me....

 

haha... i saw it dude. I just didn't go back and edit my post. I only saw it after I posted.

 

i had the same question. I wanna get the ZZP midlength header,DP combo+gmpp performance exhaust. Anybody know if this will void the warrenty?

 

from what i've read on this site over the years the answer is this:

ANYTHING not OEM has the potential to void your warranty. It all depends on what goes wrong with your car. And if you think it's something that is unrelated and you've been wronged, it's all dependant upon a dealerships willingness to stretch the truth. You won't be able to fight it if they do claim something outrageous, if that helps answer your question. But at the same time they are supposed to be able to link the damage to the mod. For example, if you have an exhaust and your power steering goes out, they aren't going to void the warranty just because you have a single aftermarket part on your car.

A more personal example. I have aftermarket work done (Stage 2, 2.9, intake, exhaust, STS, Torque damper), and I cracked my DP after some wheel hop. They fixed it under warranty, no questions asked because wheelhop is something typical of our cars. But this is also a good example of how it really depends on the dealer, too. They could have blamed that on the fact that I have more than factory power and I drove abusively, but they didn't. It's hit or miss when modding. You either mod or you don't, there is no road you can take to mod your car and be warranty compliant.