downpipe installation
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From: middle of nowhere, Kansas
downpipe installation Any hints how to install a ZZP downpipe? I can't seem to find a removal guide. Does this sound about right? Put the car on jack stands. Disconnect the O2 sensor. Unbolt the front bolts and rear bolts. If the bolts aren't rusted, it should be fairly easy, right?
That about sums it up. I used 2 12inch extensions to get to the 3 bolts that connect the rear manifold. If they're rusted get some pb nutblaster and let it soak for a few minutes. Get a new set of gaskets or you will be in there again. When tightening down the bolts do it like a tire. A little on one side a little in the other so it tightens evenly.
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From: middle of nowhere, Kansas
Thanks. I haven't ordered the parts yet, but I will get new gaskets when I do. I'm still up in the air about cat or catless (no inspections here so I could go either way).
Next question, the exhaust is a little louder after you swap in a ZZP downpipe, right? How noticeable? I want a little more growl and rumble, but I don't want loud.
Next question, the exhaust is a little louder after you swap in a ZZP downpipe, right? How noticeable? I want a little more growl and rumble, but I don't want loud.
Teching In
Joined: Mar 2013
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From: Tulsa, OK
No inspections here either but I wouldn't go catless. I live in the city and drive my Impala every day. All it takes is one grumpy cop smelling your butt, and it's a huge fine, maybe get your car impounded. Not worth the risk imo. At least use a fake one, or get a high flow cat
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On The Tree
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From: peoria il
Not sure if u will have this problem but when I got mine the rear bolt location had to be grided out a little or the opening of the pipe wont align right. I dunno that's what I had to do.. The hole the bolt goes through needs grinned out a bit so the bolt can go a little further out to bolt up right.. Easy fix will the right drill bit.. I have a GXP btw lol
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Verdad Gallardo That about sums it up. I used 2 12inch extensions to get to the 3 bolts that connect the rear manifold. If they're rusted get some pb nutblaster and let it soak for a few minutes. Get a new set of gaskets or you will be in there again. When tightening down the bolts do it like a tire. A little on one side a little in the other so it tightens evenly.
Your probably looking at around 15-20 wheel horsepower. The stick pipe necks down to around under 2 inches. And the deletion of the cat gets rid of the rest of the restriction. You will need a tune to get the most of an improvement.
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From: middle of nowhere, Kansas
ZZP says the downpipe is shipped. I ordered the stainless steel one with the high flow cat plus gaskets. I also ordered the square poly upper engine mount bushing. Not sure what I'm going to do about the intake yet. Might just leave the stock box or do some minor tweaks. If I get a new smooth 45 degree silicone elbow (TB to MAF), what are people doing about the PCV hose/fitting?
I just poked a hole and shoved the barbed plastic fitting through. Careful not to poke too large of a hole. The fitting pops right out of the stock hole. Its been fine for about 40000 miles and numerous track passes.
I used this elbow by shortening each side by a few inches with a razor till it was perfect.
http://item.mobileweb.ebay.com/viewi...id=47910818386
http://item.mobileweb.ebay.com/viewi...id=47910818386
Thread Starter
11 Second Club
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Joined: Feb 2005
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From: middle of nowhere, Kansas
So, you used a 3.5" diameter hose? I read in another thread that 3" was too small and 3.5" was too big. Supposedly a 3.25" is what fits perfectly.
