Center Box

[clio.ben]

So, we all know about the flat spot when we take out the Center box, ( not sure about de cat tho..) anyway i was messing about with some mates down the bus stand and one of them had the great idea of taking the cap off the air intake, so i did, and the flat spot was near enough gone!
i know its not the best idea, sucking in random stuff, but it might help solve the pre cat and cat flat spots

 

[Roy]

Not good I wouldn't have thought but I never hear anyone saying they done it