Hey all,

Looking into buying an RBC intake manifold for my DC5R to replace the shitty PRB manifold. My options are:

1. Buy RBC and pair it up with stock throttle body using adapter
2. Buy RBC and get it ported to 70mm (ish) and buy 70mm throttle body

Question is, is it worth boring the manifold out to 70mm and pairing it with a 70mm throttle body? Or am I going to see the same power gains regardless of whcih option I choose? Mods are Kpro, intake, exhaust (135kw atw at the moment). Is it worth doing at all?

Any advice much appreciated.
Cheers, Nuci.