EDIT** Videos can be seen here - https://www.cobaltss.net/forums/pictures-videos-64/videos-my-new-exhaust-flyby-93824/


Like I always do after a mod, I am going to let everyone know my first impressions. Today I had my ZZP Midlength Header/3" Catless DP installed. Another member here Ben aka Boostn07 had the same set up put on his car today also. It took about 40 min to take off the old exhaust and install the new exhaust on my car. Keep in mind we were in a GM shop with a lift and all the tools we needed right in front of us.

When I first fired up the car the idle was a bit louder. Nothing drastic, the exhaust note sounds slightly more loped now (as if I had a cam). Upon taking the car for a drive, the exhaust note is deff louder. It goes without saying that the car is LOUD at WOT but to my suprise it is NOT raspy. The exhaust sounds exactly like it did with just the GMPP sport cat-back but now it is 2 times louder.

For those of you who have the ZZP setup, I know alot of you say it sounds like you have a leak and I can tell you that it is the flex pipe making that sound. You dont have a leak, the felxpipe is just noisey.(Just like my catless 3" DP from zzp was on my GTP) We put my car back up on the lift after starting it because I thought I heard a leak but we could not find a leak anywhere and narrowed down the noise to the flexpipe.

I know someone was saying that they had a friend with the ZZP header/3" catless DP/ GMPP cat-back and they said that the car jerked at WOT shifts and they thought it was because of the DP. I have not noticed anything like this at all, the power seems to be smooth.

I am sorry to say that I cant notice any power gains because of the weather. Right now my car cant go WOT at under 60 without lighting up the tires due to the cold roads. I got on it a bit in 3rd gear but I wasnt paying attention to the power, I was just listening to the sound and making sure everything was ok. We are supposed to get a warm up here in a day or so and I will let everyone know what I think when I can get on it a bit more.

If anyone has any questions about anything at all just ask, I will do my best to answer!

PICS**






Mike

 

sounds good, im thinking of this setup myself, I wont have the luxury of a lift to do it though

 

did ya get the ceramic header?? stainless or regular downpipe?? did ya take any pics of the parts before installing it?? ::mouth watering::


sounds like a awesome setup, and i look forward to seeing a video and all.. did you get it with the wideband bung hole thingy :: no joke intended::

 

No worries, I think this wouldnt be a problem with a floor jack and some jack stands. It will take a bit longer and a few more swear words but you shouldnt have too much of a problem.

Sorry I didnt state that in the first post. I got the high temp paited header and non stainless DP with no bung for a wideband. I dont drive much in the winter so I am not worried about rusting and I didnt feel the extra 120$ was worth the ceramic coating. I do have pics, give me one sec to hunt them down.

 

awesome!! thanks for the pics, looks awesome

i bet ya love it the more ya drive huh

 

Best bang for the buck header on the market today

 

how much did it run ya

 

nice write up and pictures. you planning on going up to a 3inch catback?

 

Very good review.

 

how big are the header flanges?

 

You didn't throw any codes for not having a cat ??? or how did you turn it off???

 

its a leak bro.

drive it around for a while and retorque, and that sound will completely go away.

 

I have no plans for a 3" cat-back at this time, I may go with a 2.5" but I am still unsure.

I went with 1.75" primaries,


I do throw a code and I will be deleting it with HP tuners in the near future.

You may be right but we could not find a leak anywhere in the system. The only place we heard the noise was when you put your ear next to the flex pipe. I will however retorque my bolts after a bit of driving to see if it goes away. The only reason I didnt think it was a leak was because all I installed on my GTP was a 3" ZZP catless DP and it made the same sound.

410$ shipped to my door

 

we might very well be talking about a different sound then.


but yeah id suggest retorquing after it all settles in anyway.

 

I think the noise that he is discribing is just extra noise from the header and dp because there is more air flow.

 

Thanks for the suggestion tho man, I will deff go ahead and retorque the bolts in the near future. Question, is the sound your thinking of a leak from the DP or header? A leak from the header on motor side would be pretty damn noticeable correct?

 

not as much as youd expect
i had a very small one that was only noticable at certain rpms.
and was a very quiet tick. almost like when a rock gets stuck in your tire.

 

Alrighty thanks! Thats not the noise I am hearing.

When I first put the exhaust on, I drove it right outside to sit and idle because I knew it would smoke a bit while it burned off what ever it is new exhaust burns off. I got under the car and had someone tap the throttle a few times to look for any puffs of smoke comming from the DP and header connections and I didnt see any myself. The mechanic also said he couldnt find any leaks when he looked it over on the lift. But we are all humans so we could have very well made a mistake. I will have to keep a close eye and ear on it.

 

you wont see them.
best way is to put your hand around the flanges, youll feel very slight puffs.

be careful though, it heats up fast.

 

Yep, learned that yesterday . Ill see if I cant put it back up on a lift early this week. Thanks again for the help and suggestions.

 

no sweat.

 

is that step down on the downpipe from 3" to 2.5"? if so do they do that so it will bolt up to the the 2.5" catback? im curious because im looking at this for my turbo setup and i want to retain my corsa for a while

 

yes its a 3" to 2.5


http://www.zzperformance.com/cobalt_...=545&catid=155

play with that, you can see all the combinations

 

ok thanks...from what i understand you have a 3" for a 2.5 catback..a 3 in that bolts directly to 3" catback with no step down, and a weld in exit...whatever that is

 

wouldnt you want to complete it 3 inch all the way thru or wont it bottle neck at the 2.5 as apposed to 3 all the way thru?