Stoenr

How permanant does this make the H pipe tho? What if you needed to swap back to stock for any reason. Get the torch out?

holeshot

Its not permanent at all. All you are doing is welding those flanges onto the h-pipe itself, rather than them being able to slide up and down.

Stoenr

Ahh, ok. Thanks
Just ordered my H today

dustindu4

It's best to coat the pipe lip with antiseize so it slides in easy

Wharf Rat

I had the same problem with my pypes H.

There is an easy fix though. Go to NAPA and get a replacement studs with no shoulder on them. They screw right in and problem solved.

ADudeInNewJersey

Wait a min... I have my H-Pipe welded to the over axel pipe... and everytime I turn off the car, I hear something like a leak/rattling noise from the muffler... when I kick the passenger side muffler, it stops for a very short while and continues again... Is that what you guys are talking about? If so what flanges are you talking about welding?

holeshot

ADudeInNewJersey, it may not be what you are talking about. Maybe just your muffler is loose and needs to be tightened.
The flange we are talking about looks like this:



Its at the ends of the h-pipe that connects to the manifolds. What we are talking about doing is welding this piece onto the h-pipe itself.

Agleon

Was the rattle when you would accelarte hard? and sounded like it came frm the dashboard?

dustindu4

yeah that's what the rattle sounds like, from the dashboard

05gt04srt4

any extra info on this? Got the specs for the studs you purchased?

Thanks,
Alex

ScottM

You know, I've wondered why after the car has warmed up, the exhaust sounds like it might have a slight leak. I've tightened everything that could be tightened and I didn't think there would be one, but it sounds like it after I've driven it for a while. I'm taking it by to have the flanges welded like the people mentioned before, just to be on the safe side.

Agleon

What do I tell my shop exactly what I want them to do?

ScottM

I just got back from my exhaust shop and they totally got me fixed up. They brought the flanges on the H pipe back about 3/4" and tack welded them there, that way, when the pipe is tightened down, it pulls tight. They also found some bad leaks back at the axle back on both sides. Evidently, when I put them on, on one side I slid the pipe up over that nipple so when I tightened it down, there was a gap. The other side was fine and tight, but leaked like crazy as well. They fixed them all up and now it sounds a heck of a lot better with no leaks at all, and I swear it's running better as well.

Not bad for a total of $20!

Agleon, if you think you might have a leak at where it meets the manifolds, I would have them move the flange back on the pipe just a little bit and then put a tack weld there to keep it in place, that way, when you tighten it back up, it won't bottom out on the shoulder of the bolt. Or, you could replace the studs with shoulderless one's, it was just easier for me to to it the way I did.

05gt04srt4

Anyone have the specs on the bolts so i can run down and grab a set?

Thanks,
alex

ScottM

Sorry, I don't, that's why I did it the way I did it. I didn't have a way to take the bolt off and then drive down to get another one. I guess you might be able to take it off and just drive it, but I didn't really want to.

Driver

I have an 05 Gt and just put my new H-pipe on.The studs are threaded all the way up.It might be something they changed for 06 and 07 Model years.

Wharf Rat

Napa Exhaust manifold stud kit PN: 600-1819

Stoenr

Nice, thanks!!
Looks like the part # covers 2 kits. We dont need the spring kit I assume

BK 6001819
Exhaust Manifold Stud & Nut Kit stock 1.00 list 7.39 cost 6.99
BK 6001819
Exhaust Flange Spring & Bolt Kit stock 1.00 list 7.39 cost 6.99

Wharf Rat

Nope, no springs. The kit comes with 2 studs and a couple washers and bolts.

dustindu4

I welded my flanges this weekend, no more rattling. I backed the nuts off half an inch so the flange could drop down. Then I spot welded the flange to the pipe on both sides. Then I took the pipe out and put a 1 inch weld on each side of the flange. I put it in and tightened it back up and no more rattling, yay!