300bhp and 275torque .I have 05jdm sti which has 310 or more with 303torque but has equal lenght manifold and twin scroll turbo .That year does not have the twin scroll or different exhaust manifold last bits went on 03 onwards jdms the torque wise changes evey year ie goes up and the power wise is on 100ron fuel .I am running mine on optimax and octane booster till i get it remaped for optimax some others might come a long with more info than me and no scooby burble