Ok i just ordered the ZZ performance downpipe and the say it produces a 10 hp gain on a modified cobalt. Once i get it and installed i'll do a dyno to test there resusts

 

w/cat or w/ out?

 

with a magnaflow hi flow cat

 

I ordered the same, will be here tomorrow, and will be installed tomorrow. I wont dyno right away, but Ill definately update if I feel an improvement, and will race my brother and see if I can beat our current record of neck and neck.

 

sounds good man keep us posted

 

i WILL

Hey you have an aftermarket alarm. How easy is it to incorporate one with the stock alarm? Can you just replace it and have your auto door/trunk/lights parts still work?

 

it works with the stock alarm, and i have auto door and trunk

 

correct

 

i hope so!

 

get yourself a cat-back

 

Well I have stage 2, 2.5 magnaflow cat back, and Injen intake and would welcome 15 HP lol. As soon as the CI header is in stock I will ahve that too.

 

sweet sounds good

 

well i got a magnaflow cat-back and just ordered the down pipe with a high flow magnaflow cat so i'm hoping good gains

 

Having the magnaflow high flow cat means no check engine lights, and 4 years from now you will still be able to pass inspection

 

with all of the piping with the new hiflow cat and the downpipe and the catback exhaust and header im guessing were gona be runnnin supercharger-back exhausts

 

i'm hoping to see good gains from this down pipe!

 

Supercharger back Exhaust???? Wow, that's a new one, hahaha

 

Ok the downpipe just arrived, i will install it as soon as i get the new gaskets!

 

Definatly let us know how if any difference you feel. Interested in this for my 2.4 but not sure if the 3" downpipe is to big for our 2.4 NA motor.

 

The new gaskets came in today so tomorrow will be the install of the header and the downpipe!

 

IM having weird noises come from mine. I replaced the stock gasket inbetween the catback/downpipe which was all melted and crap with a brand new one, tightened it up and everything. I know thats perfect and IM still getting the noise. So now its either the cat itself or the gasket or spot where the cat hooks to the header. I could not get to that in my driveway, so I am taking it to a muffler shop to be looked at tomorrow to see if they can identify the noise. It makes my car sound all ricey. If it where not for that noise it would be perfect.

 

What kind of noise are you getting? and how was the install?

 

Catback exhausts start at the flange behind the cat and usually go pipe, resonator, more pipe, muffler and tip. They don't include or have anything to do with the cat; they start at the flange after the cat.

The ZZP downpipe runs between the stock header and the flange after the cat. The missing link. Whether you get one with or without a cat is up to you.

Hope I explained that ok.

 

I had an exaust leak previously and it sounds just like that. I had my 2.5 magnaflow catback welded and problem went away. Now When I start the car or idle it sounds fine. When I punch it theres like this noise, very hard to describe, but definately sounds like a leak. I checked everywhere but where the new downpipe connects to the header, so there may still be an issue there, and I will ahve that checked out tomorrow. If thats all it is I will update, maybe an issue with the gasket up top too. If not I will update, and look at a replacement cat for a fix.

 

Lol were are not turbo bro, supercharger=intake manifold. turbo=exhaust manifold.