The SBR S1 is our most popular choice for the Impreza STI 2000-2017.
Improved throttle response, extended power band, peak boost at 1.4-1.5 bar resulting in 340-350 peak power. We install a 200 CEL sports cat, Walbro fuel pump, Performance panel filter and SBR power map. .
The SBR S2 upgrade is ideal for the fast road and track day enthusiast. Improved throttle response, extended power band, peak boost at 1.5-1.6 bar resulting in 380-400BHP peak power. All remapping is carried out on the road for best real world results.