I'm trying to work out what size exhaust I've got.
I know there's 2.5 and 3 inch but what would the outside diameter be of these.
Is there also2.75"?
Or if anyone can tell me from pics?
Was thinking of getting a resonated centre and quieter backbox.

 

Looks standard 2.5" to me, i've got 3" system looks bigger than that

 

2.5" I'd say ... Get some vernier callipers and measure OD

 

Cool. Cheers.was hoping 2.5 as more choice.
I was gonna get a bit of string and measure around but would need circumference i suppose. :-)

 

measure round the tube then divide by 3.14 that will give you the dia of the tube
Phil