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Performer X The Performer X intake manifolds for Honda Civics are engineered for street/strip applications where peak torque and horsepower gains are realized between 3000-7800 rpm. The larger-than-stock plenum volume and 9'' runner length are tuned for producing peak power at high rpm. The Performer X Series manifold is ideal for all-motor and turbo applications. Upgrade at any time to bolt-on 4 auxiliary injectors by simply drilling out the pre-machined injector bosses. Injectors sold separately.
