Cat back exhausts worth it?

[doeboy]

Ok i only know a little about this, yes i could search but i'd like a specific answer not, generic. I've heard with a turbo you can gain upto 40Bhp is that true? I'm put off by the idea of having to change the dam thing before MOT every year!

 

[jcb]

no it is not true (outside the pages of MAX power!)
I put on a turbo back miltek on an otherwise unmodifies 1.8t. spools up a little earlier, by few hundred rpm, little quicker to respond, similar top end, may have slightly better acceleration, but i doubt if it has freed up any more that 5bhp!
sounds better and makes a welcome addition to the ongoing list of additions though.
ans as it was £100 of eBay it was a bargain!
don;t go buying big fat exhausts expecting whiplash from the newfound acceleration

 

[joost]

I'm put off by the idea of having to change the dam thing before MOT every year!

If it's cat-back you won't have to - the cat should still be in full working order. Just be aware that some exhaust manufacturers' claims are wildly exaggerated so don't believe all the ******** on their sites.