Originally Posted by Mr C

Im still after minimal lag with decent 330bhp from a std compression 2wd YB, it will run 803s and a 3bar MAP, what can be changed on it to improve throttle response on a std engine?
exh manifold- change to a tubular type? Waste of time
inlet manifold- change to a Swedish type? Waste of time - loss of response you alread mentioned. Only needs changing beyond 430bhp for 2wd (then fit an EECIV one which is good for 500bhp).
T34 exh housing-down size to a .48 from .63? Good choice
Pace rS500 type cooler or 2x 2wd Icooler welded infront will be sufficient for cooling and response?Would recommend Pro-alloy / Radtec instead - or even just a 4x4 item

anything recommended or should I steer clear of? Apparently at my power level and even 380-400bhp a swedish inlet will reduce throttle response? I could polish the trumpets and inlet inside to speed air flow maybe??