FezzyST

what would be the best diameter for boost pipes?
the inlet and outlet on intercooler is 2.5"

EIL132

2.5"

privatepie

2.5"

FezzyST

its just that the turbo outlet is only 2"
then theres the MAF which is 3" so is the Throttle body

Fiecos Dan

matters wot power you want.

i run 2" all thro on my xr2tt, and seen a pulser get 370 bhp on 2" pace boost pipe and inter set up.

on my cossie i run 2.5" boost pipe thro out, and is fine for over 550+ bhp.

the bigger the boost pipe, slightly more lag, if to big can help turbo run out of puff, and the more space is needed to fit it in.