Ford Focus st170

The Mk1 Focus ST170 — running the variable-cam 2.0 Duratec ALDA — is a brilliant base for a sharp UK track or fast-road build. Naturally aspirated tuned, it makes a great revving NA platform; lightly forced-inducted, it climbs power easily. Pro-Race Engineering can supply the harder-wearing components an ST170 build needs once it’s pushed: Supertech valvetrain (including dual valve springs and retainers sized for Duratec heads), forged connecting rods, race-grade bearings and ARP head stud kits.

If you’re tuning an ST170 for the road, sprints or track, call our engineers on 01621 473023 to confirm the right rod, piston and head fastener combination for your target power and intended use. Lead times vary by item — confirm before ordering.