olliecampbell

iTrader: (3)

Hi All,

Possibly a basic question, but how can you work out what exhaust size you have i.e. 2.5" or 3"?

Is it purely the external diameter of the exhaust? Does it have to be measure at a specific point in the system?

Ciaran

iTrader: (16)

Depending on the system it may change in diameter at different points.
Measuring the outside diameter will tell you if it is 2.5" or 3".

wrx fifer

iTrader: (34)

just put a tape measure against it not round it and will pretty much be one or the other

olliecampbell

iTrader: (3)

Thanks all.

I guess by against it you mean measuring the diameter rather than the circumference?

wrx fifer

iTrader: (34)

yes it should be obvious what the size is