172 exhaust bore size

[Josh@Renparts]

What size is the bore between the cat and the back box?
thanks
josh

 

[Josh@Renparts]

bump?

 

[Rhino172]

Would be interested to know...so bump that right up there!!

Also what's effect'difference between a larger bore and a small bore (say 3" and 2.25")? other that noise! lol

(look at me using the search button! woop woop! lol)

 

[nathanH]

2" iirc.

 

[nockmeister]

Also what's effect'difference between a larger bore and a small bore (say 3" and 2.25")? other that noise! lol

Too little back pressure say using 3" bore (and i'm talking whole exhaust not just the back box) and you lose performance.. I believe 2.5" is the optimum.

 

[Rhino172]

cool! cheers peeps, I thought that was it but just wanted to make sure...