6ocyclehum

I have a Dansk cat back, and it made a terrible rattle from 3-4Krpm, noise went away pretty much, but recently I heard it a little, and realized the center bracket was missing. Sourced one, and installed, as low as possible (still needed to use a jack to get the holes to line up), and the pipe pretty much touches the rear sway bar. The reason it had quit rattling was the weld on the back mount had broken and it was hanging lower. Glad I caught it, as I had my headers replaced last summer.
I don't see much adjustment in the cat back piece. Both brackets are as low as possible. I read through the archives and didn't see much on this, seems this is an unusual problem. It's just a 2.5" Dansk stock exhaust (I think it's 2.5), I have read in the archives of people using up to 4". Seems like 2.5 would have lots of room. Got the car last summer and the pipe was new then. Rattled when I bought it.
Why in the world is mine fitting so bad?

Van

Not made within tolerance? Manufacturing mistakes happen.

JohnKoaWood

Nah, mine did the same thing, give it a small relief right where it is touching, rattle and knocking when cold will go away, my PO swapped to M030 t-bars, and the old muffler I took off had a small relief right at the sway bar, NEW dansk needed the same...

6ocyclehum

I wondered that, but figured Dansk would have it down, and I must be missing something. If that is the case, wonder if a muffler shop could bend some clearance in without too much trouble?

xsboost90

hm- im running 3" and no rattle.

6ocyclehum

Remove and whack with hammer? Any tips on giving some relief? As close as it is, it could use quite a bit.

knfeparty

my system has a relief for the sway bar...but it actually taps the transaxle now so maybe it's time to give it some "relief" there too.

CurtP

Guess I'll be pulling off my POS SFR and making the relief on it too. Does anyone make a nice 3" cat-back for these cars?

JohnKoaWood

Whack with a bfh (big flickin hammer) a few times and run... don't collapse the tube, just dent it to clear the sway bar... you could mark the muffler where it needs relief with a sharpie or grease pencil... wipe off the mark when done...

The dansk pipes stay well clear of the trans, shouldn't be an issue there, they just tuck in so tight to the bottom that it hits the sway SOMETIMES, my 951 only does it until the exhaust heats up, then it is clear...

6ocyclehum

I'll remove it this weekend and give it a whack. Might try drilling out the mounting bracket holes a little to mount it a tad lower. Looks like there is some kind of joint compound in the joint to the cat. Any preference for a good joint compound to use here? Never fooled too much with exhausts, except for coat hangers :-)

JohnKoaWood

Shouldn't be any joint compound, only a sealing ring...

Jeff N.

OT - John, ever thought of cutting down that sig a bit? That thing is freaking huge.



Of course, not paying my $18 to IB means that I don't even get one.

JohnKoaWood

My sig is the product of much prodding, and angst spent debating the flight capability of a conveyor bound plane... but yeah, I guess I could consider it.... Nah..

My Avatar is as well now thet I think about it...

it is a plane, with square slick 50 wheels, flying around Uranus... in case you were wondering....

Van

Looking for Klingons, no doubt.

JohnKoaWood

Were you in that thread?