I already have a decat downpipe and straight through mid section and when I added a straight through backbox a few weeks back it was ridiculously loud!!

So I saw this

http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA:IT&ih=007

I know it's a shot in the dark, but the person selling it wasn't up on exhausts so I couldn't get much help from them, but when I saw JASMA I thought it's unlikely to be straight through, but I don't want it to silence loads, any ideas?

 

Looks like you already bought it!!

I have a Jasma backbox. I presume it was fitted in Japan. Its not too noisy, quite quiet on tick-over, I shouldn't think it would offend the neighbours. When the revs rise though it does sound good, a little quiet for some tastes I expect. I like the fact that it is understated until you give it some beans, great for cruising on the motorway..