24-01-2014, 07:08 AM
(This post was last modified: 24-01-2014, 07:10 AM by mattyh24hdi.)
Well I dont like to guess as its not been on the dyno. Well these will easy take 650 standard block not much tuning involved.
Mine has the f23 5 speed from the astra gsi been absolutely fine.
(23-01-2014, 09:46 PM)THE_Liam Wrote: Yes! Think my mates was stage 4, there's a big step up there for not much more money, although it had issues with killing gearboxes
Mine has the f23 5 speed from the astra gsi been absolutely fine.