Building my own exhaust...
 

Dint quite know where to put this, but I really need a new exhaust. Mine is broken in several places and is quite rusted. However the mufflers were both just replaced before I bought the car.

I will probably do a custom header into a straight pipe into the Y, out to the current mufflers for now.

It looks like I can order all the tubing from RB, and I know how to weld.

My real only 2 questions are:
By droping the resinators and cat, other then emmisions, what problems could I face?

By copying the current exhaust, I should be able to match the mounting points, and make a straight pipe with the cat tube. Can the mounting points be purchased from RB?

A buddy of mine has made several custom exhausts, including a true dual for his 91 13b. SO I am turing to him for more advice.

Hey man, keep us posted on progress and with pics, I need to do something like this soon aswell for my GXL. :)

Cant be of much help on your questions though.

Why aren't you going dual? If you're building something from scratch anyways.

I am almost considering using the RB header as a bolt on option and spliting it from there...

Using a non dual exhaust... well because my car does have to pass emissions. But what I am looking at doing is a drop in cat, that while removed has a bolt in straight pipe with the apropriate flange mounted on it for the engine emmisions pipe.

I guess I could, and register my car at the coast where testing is not required... :D

Ah wonderfull emissions, that is not really a big problem for me.:)

Do you have an S4 or S5?

I've got an S4, dont know about spyder:)

I just had the cats and other stuff ripped out of my car and piped welded in it's place. (God bless living in nowhere land. No one cares about your pipes :D ). So i have a strait pipe from the stock manifold to the stock Y and then pipes. Hey it was cheap, $60. Besides emissions your idle might be slightly off. That'd be about it.

I have a race car that is is also street legal. I am racing on a budget so I chose this configuration:

RB header to a single RB presilencer (damn, that thing is too heavy)

RB Y pipe (very affordable and very high quality)

One muffler on the right side

One straight pipe on the left side with a flange on the end. (just barely quiet enough for the race track)

I bolt a cap onto the flange on the street and run through only one muffler.

This allows a sort of straight through exhaust for the track and a slightly loud exhaust for the street. The only penalty is the extra weight of carrying a useless muffler with me on the track. it doesn't seem to hold me back too much.

For inspection I bolt the second muffler in it's proper place and I have had a generic cat welded up to fit in the same place as the RB presilencer with a pipe for stock air injection. Very clean emissions.

ed

Pics?

Looks like I will make my own header, drop it into a pre silencer (on my friends opinion that it would be LOUD), that also drops out and can have a cat put in its place. Then pipe into the Y, out to the two mufflers.