I have a suzuki gsxr400 1989, i want twin exhausts, how would i got about doing this, what are my options, is it a case of a straight bolt on pipes, are they all the same width apart from where you connect them, would there be some welding involved, thanks

this is what i mean, the twin exhausts down one side

"Shotgun Silencers"
If you want to do them properly the exhaust needs to divide under the belly pan and come out parrallel. Then you need to calculate the diameter of pipe to be used to get the area roughly similar to what you have already.
Really they use two pipes when one pipe is going to be too noisy, you get more surface area per baffle.
It looks ok when it's done righ looks stoopid when it isn't and it's very hard to get right.

Better left as a 4 into 1

Theres a company that make's one in Japan, you can buy new for mega money. A member had one for sale on here not so long ago.

http://page14.auctions.yahoo.co.jp/jp/a ... s247829221

http://page14.auctions.yahoo.co.jp/jp/a ... s247829223


You can get these I have been debating on importing them at the moment the exchange rates are putting me off

Hi, sorry what is this link, i cant see a picture and all the writing is in japenese, is it supposed to be or am i just being stupid, thanks

Its a link to a Jap auction and as its ended the pictures are not working.