Thread: ZZP Headers clearance

2005 GTP. I've installed the ZZP headers, and I have a couple of issues.

1) the front header just barely touches the little nub on the back of the passenger side fan. Can this be shaved off?
2) the front header also seems to barely touch the AC line from the compressor. Can this be bent easily to give some clearance? Other options?

I've read some other posts that talk about getting slimmer fans, or removing the fan cover, but I'm not sure I really want to go that route.

I don't know where its touching as I have speed daddy headers and had different clearance issues but you should be able to shave off the nub as it may have even just been there to give it more support when installing at the plant just make sure the webbing is still connected. if youre unsure send a pic of the nub and I don't know where its touching the line but maybe you can mount the canister that's under the airbox a bit lower or something and that will move the line you see the line is flexible tubing between the canister and compressor at a certain point see if you can use this in some way before bending the metal line not that it cant be done just have to be careful. but I know im lowered and have my engine pulled forward and had to remove that little metal plate for mine to fit havnt had any issues with it new headers run much cooler than the og cast iron

I will get pics of the fan clearance when I get home tonight. See link for the pic of the part of the A/C line that header is touching. It's the little canister that it's hitting, not the line itself.

ACline.JPG - Google Drive

I got the fan and A/C line clearance issue resolved. I can at least fit a piece of paper between the headers and the fan now. Not sure if that's going to be an issue or not, but I'm sure I'll find out. My main issue now is the transmission filler tube. I can get it to go back in, but the header is in the way for it to be able to bolt back down. This has been a PIA, and I've already trashed one tube trying to bend it. I think I'm going to half to cut it, and then have someone weld it in a direction that will work. ZZP doesn't even mention this as a possible issue in 04+ GP's, nor do they even want to try and help. Did anyone else have this issue?

for my speed daddys I can 100% relate to this had to move of the house the next morning and was with my friend late that night completing the install had to bend the tube out of the way and cracked the first one. picked up a tube bender from home depot right before they closed and then had to climb a 10 foot wall into the junkyard and grab a new tube since everything was closed. seen some shadows coming our way when we left lol I always try to pay that junkyard more though because my intention wasn't to steal but it was the only way I could get the part for days. we went back home used the tube bender very carefully and got enough room to put it on and be able to fit a piece of paper thru without drag my friend didn't know a thing about cars at the time but I couldn't have done it without him haha especially the wall climbing part

I can't even begin to tell you the words that were coming out of my garage that day. Of all the things holding up a header and exhaust system install, the damn dipstick tube.... That's the frustrating part. And you can't do anything without it, because you lose more than half of the tranny fluid when you remove the thing. Does anyone know ballpark how much tranny fluid is lost when you pull the filler tube out? I bought 4 quarts, but looking at my drain pan, there's a good amount of tranny fluid in there.

Still trying to get the tranny dipstick tube to fit around the headers. I should've had this running a week ago, but this tranny tube has F'd everything up. I'm going to have to resort to bracketing the tube down, because the hole will never line up with the hole used when the stock manifold was in.

ZZP mentions fan clearance for 04+, but nothing on the transmission dipstick NOT fitting at all.

Seems like a lot of work for 3hp.

Well, I was hoping for 3.5 to 4 hp after the tune. I guess I should've left the stock manifold on there.

Headers are a great foundation upgrade.. the benefits of them arnt seen in the headers alone. but what comes after.

I would say if you don't plan on other upgrades then not worth the hassle.

Plus the drop in Kr is always a plus


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Do you run stock manifolds on your car? Not really the place for a argument about headers. He has them installed already so ya

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I could've just went with the down pipe, but what's done is done. And I like the experience of doing things to the car that I've had to put off far too long. Not to mention, the exhaust was developing holes all over, and the resonator looked like someone peppered it with a shotgun.

And it's this forum that made me decide to put the headers on in the first place. Most of the threads here say that in order to drop pulley sizes, you have to at least replace the DP, but if you can swing for headers, do it. So I did. Was it a pain in the ass, yes. And only because of a damn dipstick tube...that's what frustrated me. There were a couple of other clearance issues, but those had rather easy workarounds. And what pissed me off the most was ZZP mentions the fan clearance issue, but not the tranny filler tube. I went thru 3 tubes before I got it right.

So hopefully, after tuning the car, then dropping pulley sizes and tuning again, I can get a little more than the 3hp that you mention. And seeing a lot of people on here do have headers, I'm guessing there are benefits to having them.

Not looking for huge gains on this car. The experience of working on the car, and it gives me something to do besides painting the house.

The only other thing I will do is change out the pulley to 3.6 or 3.5, and then try to tune it for around E30. The difference on my other car from the 93 pump to E30 tune was night and day difference.