Installing a muffler on NB8B

wedge_A · Postby **wedge_A** » Sat Oct 17, 2015 10:32 am

Hi all,

I'm just looking for some advice on installing an aftermarket muffler on my NB. I've just bought a used Autoexe rear muffler from the friendly and easy to deal with 97 MXV, and am ready to fit it to my car. Before I take my old muffler off, I have a few questions.

Is there a gasket that I should replace when changing the muffler?
The internal diameter of the piping leading into the muffler is 2 3/8 inches. Will that be able to bolt onto the standard mid pipe without and modifications?
Is washing detergent the best way to remove the rubber brackets that hold the muffler in place? (They seem like they will be a bastard to remove!)

If anyone can shed some light on these queries it would be much appreciated.

Thanks!

Postby **NitroDann** » Sat Oct 17, 2015 10:45 am

wedge_A wrote:Hi all,

I'm just looking for some advice on installing an aftermarket muffler on my NB. I've just bought a used Autoexe rear muffler from the friendly and easy to deal with 97 MXV, and am ready to fit it to my car. Before I take my old muffler off, I have a few questions.

Is there a gasket that I should replace when changing the muffler?
Use high temperature RTV from repco on both sides of the existing gasket is my suggestion.
The internal diameter of the piping leading into the muffler is 2 3/8 inches. Will that be able to bolt onto the standard mid pipe without and modifications?
Ask the seller.
Is washing detergent the best way to remove the rubber brackets that hold the muffler in place? (They seem like they will be a bastard to remove!)
A crow bar is probably needed, you can do it with your hands but its awkward and you need strong hands.

If anyone can shed some light on these queries it would be much appreciated.

Thanks!

wedge_A · Postby **wedge_A** » Sat Oct 17, 2015 12:00 pm

NitroDann wrote:
wedge_A wrote:Hi all,

I'm just looking for some advice on installing an aftermarket muffler on my NB. I've just bought a used Autoexe rear muffler from the friendly and easy to deal with 97 MXV, and am ready to fit it to my car. Before I take my old muffler off, I have a few questions.

Is there a gasket that I should replace when changing the muffler?
Use high temperature RTV from repco on both sides of the existing gasket is my suggestion.
The internal diameter of the piping leading into the muffler is 2 3/8 inches. Will that be able to bolt onto the standard mid pipe without and modifications?
Ask the seller.
Is washing detergent the best way to remove the rubber brackets that hold the muffler in place? (They seem like they will be a bastard to remove!)
A crow bar is probably needed, you can do it with your hands but its awkward and you need strong hands.

If anyone can shed some light on these queries it would be much appreciated.

Thanks!

Thanks for the quick reply Dann, and for the good advice. I'll definitely try high temperature RTV. As far as the pipe diameter goes, do you know the diameter of the standard exhaust?

hks_kansei · Postby **hks_kansei** » Sun Oct 18, 2015 12:15 am

Diameter should be ok, most jap exhausts are designed to bolt up to a standard system.

RTV will work in place of, or with, a gasket. A new gasket will be best, but the RTV will still do the job, just messier (and annoying if you need to take the muffler off later)

Removing the hangers is not that bad, give the metal ehxuast hanger a squirt of WD40, or any lubricant really, doesnt matter as long as it's slippery. Dishsoap works fine if you prefer. Try and pry the hole open with a flat screwdriver or something and get the lube in there to help.

I find that using an open ended spanner is easiest to pry off the hangers, since you can put it over the hanger and the spanner shape stops it slipping off.

The OEM hangers have a mushroom shape to the end of them, which is that makes them so hard to remove. Once you've got the rubber over them it gets a lot easier.

wedge_A · Postby **wedge_A** » Sun Oct 18, 2015 2:35 pm

Alright, So today I went ahead and fitted the muffler today using the advice of the helpful people above me. Got to say working with the rubber mounts wasn't as bad as I had anticipated. A bit of WD40 and a screwdriver made them relatively easy to take off. I did end up using high temperature gasket sealant on top of the existing gasket and that seems to have sealed it well with no leaks. The result is nice and it was a pretty quick job! Big thanks for the advice, and to 97 MXV for providing the muffler!

Cheers