Originally Posted by AaronsKa

Got an ST170 lump in my mk5 fiesta on throttle bodies. Goes well enough on the standard 1.3 endura box but changing it to 1.7 ratios with the 1.6 final drive over winter.

ST150 brakes go straight on and all of my 15s go over them no bother.

recon there’s a High 13sec 1/4 in it yet too with the ratio change and diff. Managed a 14.4 @96 on its first run out to pod