As title im after a bigger backbox for my s2. I currently have a magnex system on with a 2.5" tailpipe but MSD have said my backbox is restrictive as it drops to 2" internally. Ideally I want a magnex 4" backbox but im struggling to find one and the rest of my system is like new so buying a complete system is not really an option unless its dirt cheap. I've read scorpion are restrictive aswell and thats all that seems to be out there at the minute.
cheers nick.

 

Yes had the same with my scorpion years ago ,i got hayward and scott to make me a new one ,my mate fitted an escort cossie one to his ,made a lovely burble