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Old 08-11-2017, 08:24 PM
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Default zzp down pipe with cat

anyone ever install one? can it be done by a decent home wrench monkey like me? like in the driveway?


http://www.ebay.com/itm/3-Stainless-...53.m1438.l2649




any tips appreciated

Last edited by sharpeezss; 08-11-2017 at 08:28 PM.
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Old 08-12-2017, 05:51 AM
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Yea its two bolts from the rear exhaust manifold and two on the other side right after the u-bend..


What I found amazingly helpful was using a socket wrench with about 15 extentions attached to it because its not a "straight" shot from under the car to the bolts on the rear manifold..

Please tho, for the price of that downpipe look at this.. These come with a 3" DP..

STAINLESS SS RACING MANIFOLD HEADER/EXHAUST GRAND PRIX/GTP/REGAL/IMPALA 3.8L V6 | eBay
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Old 08-12-2017, 05:59 PM
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Quote:
Originally Posted by wht02monte View Post
Yea its two bolts from the rear exhaust manifold and two on the other side right after the u-bend..


What I found amazingly helpful was using a socket wrench with about 15 extentions attached to it because its not a "straight" shot from under the car to the bolts on the rear manifold..

Please tho, for the price of that downpipe look at this.. These come with a 3" DP..

STAINLESS SS RACING MANIFOLD HEADER/EXHAUST GRAND PRIX/GTP/REGAL/IMPALA 3.8L V6 | eBay
Ohhhh how tempting!! that's a good deal . Ill have to think this over
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Old 08-13-2017, 09:24 PM
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I did a ZZP downpipe swap on my Monte years ago. Found it to be pretty straight forward. But I was also lucky that nothing was seized/snapped/rust-welded together.

As long as things come apart as they should, basic tools should do it and as mentioned, a bunch of extensions help. I had a couple really long extensions that worked well.
Here's some info on when I did the swap:
'04 Monte Carlo SS - ZZP Downpipe

As for the 3" DP, I am not a master on this, but I believe you need to watch about creating issues with back pressure since it's not a boosted car.
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Old 08-14-2017, 06:24 AM
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Quote:
Originally Posted by The_Maniac View Post
I did a ZZP downpipe swap on my Monte years ago. Found it to be pretty straight forward. But I was also lucky that nothing was seized/snapped/rust-welded together.

As long as things come apart as they should, basic tools should do it and as mentioned, a bunch of extensions help. I had a couple really long extensions that worked well.
Here's some info on when I did the swap:
'04 Monte Carlo SS - ZZP Downpipe

As for the 3" DP, I am not a master on this, but I believe you need to watch about creating issues with back pressure since it's not a boosted car.
Thanks... so maybe the 2.5 wouild be a better choice? I was just thinkin bout doin this plus a CIA.
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Old 08-15-2017, 11:06 AM
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I would go 2.5 unless you are planning on switching with a turbo or supercharger.
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Old 08-16-2017, 05:23 PM
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I put the ZZP downpipe with high flow converter on my 2003 and it is currently on my 2004 Supercharged. The stainless headers with downpipe are a great deal but with no converter won't be legal in any states with emissions testing. Also it will throw codes in your computer and give you a ses light.
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Old 08-16-2017, 05:42 PM
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Yes I think ill just try the 2.5 downpipe with cat... see how that goes
thanks for the info guys
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Old 08-16-2017, 05:54 PM
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was watching Road Kill Garage and they did a episode testing exhaust and their conclusion was anything under 500 HP gets no benefit from 3" vs 2.5" They were testing using some hooked up 350's
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