Original diffuser with mountune cat-back exhaust?

[PPKing]

Hi all,

Just a quick one..
Would any work be required to the original diffuser to fit the mountune cat back exhaust? Not sure if I fancy the £280 for the new diffuser if I don't need it!

[Tom-x]

No mate, I've got the Mountune exhaust, no adjustment necessary.

[PPKing]

No mate, I've got the Mountune exhaust, no adjustment necessary.

Perfect nice one mate cheers! Have you jus got the back box or have you got the full system?

[Tom-x]

I've got the catback, so its the backbox and the piping that leads to the front box! Best mod on my car, genuinely noticed a difference in power. Its meant to add about 11bhp

[PPKing]

Ah sounds excellent! The reason I ask is that I love the look of the twin pipes on the back, much more so than the standard 'hidden' exhausts. I'm also after more performance than sound, which is why I am hesitant about getting the mp140 upgrade. I've already got the mountune induction kit so was thinking just adding the cat back exhaust and have the best of both worlds. I know this is a vague question as it depends on what you define as being 'loud', but is just the cat back noisy? Sure, I wouldn't mind a grunt when putting the foot down, however at the same time I don't want to be tip toeing around my estate late at night!

[Tom-x]

Yeah they look great! has 'Mountune Performance' engraved at the tip of the pipes too! which I like! Its not super loud really! if you keep it at the low revs it just 'burbles', even at the really high revs it isn't really loud! but i do get people turning around to see whats approaching!

[mountneymk7]

I'm looking at just a mountune cat-back but would like to know what bhp gains I get and what sort of increase of noise I get can anyone help ?

[Tom-x]

Well I've not had my car dyno'd, but i have a mate that has, and he gained 10bhp of the cat-back!