D-cat with standard backbox

[max_west]

i want to put a decat on my westcoast with the standard exhaust??
but will it still be affective?
and how loud compared to having a larger backbox on it ??

also it has some 15s on it what can i do to lover it a bit without it rubbing with full car and make it handle better?

cheers guys

[Furio_Rob]

my knowledge of westcosts isnt the best......
is the cat in the center section or manifold?
cos getting a decat pipe wont do that much i dont think, but if it was a mani it would
i think its more sound affective then performance, but im not too sure
see what other people say

[max_west]

not sure if its in the middle iv got a pipe to fit it, other than that what is there i can do to make a westy faster ?