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04 SS Headers/Downpipe/Exhaust
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NewbiePala04SS
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PostPosted: Sat Feb 04, 2012 4:47 pm    Post subject:  04 SS Headers/Downpipe/Exhaust Reply with quote

Hey guys, havnt been around in awhile. Been busy, but taxes just came in and was looking to do some stuff to the Impala.

I am getting the ZZP stainless steel headers with the 304SS downpipe

http://shop.zzperformance.com/.....aders.aspx

I have to choose to either stay with the exhaust i have which is 2.5'' and 6? years old. Or go with a new exhaust while im getting the headers. The 3" Stainless steel from ZZP looks good too. As I dont see any issues with fitment if I get them all from the same place.

http://shop.zzperformance.com/.....haust.aspx

I just need to make sure it will fit an impala, because it only has Grand Prix as a choice.

Will a 3" exhaust do any harm to the car? I know gains are low.

Could I use my current mufflers? Because the Custom Y transitions from 3" to dual 2.25"

Basically its either keep this exhaust or go with the Stainless steel.

Any opinions?

Thanks!
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outonthetiles
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PostPosted: Sat Feb 04, 2012 5:43 pm    Post subject:   Reply with quote

Your stock cat-back is good until you're making alot more horsepower. Yes, the ZZP headers will fit your car. What made you decide to go with the ZZP headers?

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NewbiePala04SS
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PostPosted: Sat Feb 04, 2012 6:01 pm    Post subject:   Reply with quote

They seemed like the best set from the ones i looked at. Highest quality from what I can tell. idk anyone who has them.

Also I'm going from Ported engine manifolds, ToG downpipe and Highflow cat to the headers and new downpipe/cat. My current set up has a leak in it and i wasnt sure if the leak could be wielded or not. So instead of going through all the work and finding out, im just getting new.
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outonthetiles
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PostPosted: Sat Feb 04, 2012 7:00 pm    Post subject:   Reply with quote

Just asking because they seem pretty expensive, but they look like nice headers. Personally they are way out of my price range, most people have found that speed daddy headers are the best bang for the buck. You can get them on ebay for 200 shipped. Any headers would be better than PEM's, just beware that pacesetters may have fitment issues.

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Pitch Black SS
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PostPosted: Sat Feb 04, 2012 7:13 pm    Post subject:   Reply with quote

outonthetiles wrote:
Your stock cat-back is good until you're making alot more horsepower. Yes, the ZZP headers will fit your car. What made you decide to go with the ZZP headers?


he doesnt have a stock exhaust, custom from the engine back. He bought my 04SS.

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outonthetiles
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PostPosted: Sat Feb 04, 2012 7:30 pm    Post subject:   Reply with quote

Well that should be even better...

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NewbiePala04SS
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PostPosted: Sat Feb 04, 2012 8:46 pm    Post subject:   Reply with quote

Pitch Black SS wrote:
outonthetiles wrote:
Your stock cat-back is good until you're making alot more horsepower. Yes, the ZZP headers will fit your car. What made you decide to go with the ZZP headers?


he doesnt have a stock exhaust, custom from the engine back. He bought my 04SS.


What he said, cause i fail at keeping my posts updated and correct. Think im just gonna get headers and downpipe. I'll post pics and sound clip after they are installed.

outonthetiles wrote:
Just asking because they seem pretty expensive, but they look like nice headers. Personally they are way out of my price range, most people have found that speed daddy headers are the best bang for the buck. You can get them on ebay for 200 shipped. Any headers would be better than PEM's, just beware that pacesetters may have fitment issues.


I read that the pacesetters may have fitment issues and they dont last very long. I didnt like the ebay ones because there was so many pieces.
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PostPosted: Tue Feb 07, 2012 11:20 am    Post subject:   Reply with quote

Headers and downpipe are ordered and on the way. Very Happy
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PostPosted: Sat Mar 10, 2012 4:56 pm    Post subject:   Reply with quote

Finally installed them. ZZP Headers/Downpipe. The rest of my exhaust was rusted and kinda fell apart... Reused the muffler and went to a single muffler and not Dual. ATM I needed to get an exhaust on the car and i had one muffler handy.

Are there pros and cons from having dual vs Single? Friend was saying i should have more back pressure with a single exit?

Ill post pics soon and add more about the installing of the headers later.
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Pitch Black SS
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PostPosted: Sat Mar 10, 2012 5:57 pm    Post subject:   Reply with quote

NewbiePala04SS wrote:
Finally installed them. ZZP Headers/Downpipe. The rest of my exhaust was rusted and kinda fell apart... Reused the muffler and went to a single muffler and not Dual. ATM I needed to get an exhaust on the car and i had one muffler handy.

Are there pros and cons from having dual vs Single? Friend was saying i should have more back pressure with a single exit?

Ill post pics soon and add more about the installing of the headers later.


more or less on these cars dual is for looks. Basically the entire cat back is a style thing, no real gains. Just looks and noise.

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PostPosted: Wed Mar 14, 2012 1:04 pm    Post subject:   Reply with quote

3" cat-back helps once you get to 250whp (3.25/rockers/tune plus the headers which is why I typically recommend a 3" cat-back with headers).

One muffler is more restrictive than two in parallel. Depends how restrictive the muffler is on whether it'll impact your performance.

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NewbiePala04SS
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PostPosted: Thu Mar 15, 2012 12:28 pm    Post subject:   Reply with quote

I keep getting the P0306 code for cyc #6. It only happens when I am driving, idle is fine. Says its misfiring. Even in park if i rev the engine theres no code or misfiring. It's only when i'm driving, like its not producing enough RPMS for the gear im in. When the engine gets into that deep hum noise (I think you know what im talking about) is when the misfiring starts and it gets bumpy so i let off the gas and its back to normal.

I goggled the code and got :

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

As possible reasons why its popping up. How are some of the ways i can check theses? Plugs are new. Never had any issues till i put the headers in.
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nightryder
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PostPosted: Thu Mar 15, 2012 12:38 pm    Post subject:   Reply with quote

Pull the plug and make sure you didn't hit it when you installed the headers. If it looks good, swap the plug with another cylinder and see if the misfire travels with it. Do the same with the wire.

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PostPosted: Thu Mar 15, 2012 3:46 pm    Post subject:   Reply with quote

wire could have hit the header and causing a misfire, look into that as well

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NewbiePala04SS
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PostPosted: Fri Mar 16, 2012 1:15 am    Post subject:   Reply with quote

Pitch Black SS wrote:
wire could have hit the header and causing a misfire, look into that as well


That could cause it even though they are insulated? Ill check into that. That wire really makes sense. seems so simple.

nightryder, I been planing on doing that but the last few days been crazy. Ill check that out tomorrow morning also. Ill check out the wire touching the headers 1st.

thanks guys.
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