So, speaking to a mate. He said that unless i'm gonna completely upgrade the system from back box through to manifold then its not really worth shelling out for just the middle and back box. He suggested going for a standard middle box and then just a performance backbox as any performance gain from the middle would be totally minimal.
just wondering if anyone else agrees/disagrees with this?
I'd go with that to a degree, manifold back is a bit keen 'cos you've still got a Cat in the way.
A full Cat back system would 'breathe' better - true, but big dollars for a good system

Just a back box - well not gonna see huge BHP gains, usually a back box is the most restrictive part of a system so benefits are gained as too are a deep burble from a good brand, rather than a Jap style rasp of budget boxes.
If dosh is tight I'd hunt the trusty eBay for a 2nd hand system or rear box.
If you end up with just a rear box maybe try someone like GSF carparts for a middle section.
Bear in mind tho to budget for fitting, a local garage would doing for a few quid

do you need a full system? which bit is iffy?
