Exhaust Question

[-Jason-]

So a friend of mine has an R26 and has removed the back box to make it sound better and another with a 197 removed the centre box to make it sound better.

Has this ever been done on a cup as I would rather do this than decat it tbh.

Also I have two middle boxes which would I remove?

 

[montana]

the backbox fell off my cup recently & it was very loud & boomy - did sound good at times though

 

[aj04 rea]

remove both of them leave cat then straight pipe to back box or boxes! just fitted a yozza with cat left in sound unreal and theres a power diffrence!