Airtec Stage 1 300bhp to 425bhp Focus RS Mk2 Intercooler & 2.5inch Boost pipe upgradeA must for all re mapped RS's, Everything you need is included in the kit. 2. 5" Hard pipe upgrade removes fords 2. 0" restrictive boost pipes. We saw gains of 11. 8 bhp & 9 lb ft torque increase's over the standard ford pipes, these gains were achieved by simply bolting on the big AS 2. 5" Boost pipe kit! Intercooler spec. Air Ram Scoop, forces Air directly into core of intercooler Huge high flow 60mm core, lower ACT Temps, Smooth flow end tanks, no