9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
i am looking at rebuilding an enhanced ecotec motor capable of 450+whp for street and occasional track applications.
would an internal upgrades such as forged piston, conn rods, etc, suffice?
i know there are two workshops, FMSR and ZZperformance specialise in ecotecs, with enhanced blocks...