At BAIN Racing all of our intakes are custom built to match our customers build. This way we can maximise gains around your compression ratio, your RPM, Cubes etc. This way we can adjust the Plenum CSA to how you want it, If you want more torque, We can reduce plenum CSA, and vice versa, Bigger CSA adds RPM. Also runner length longer for more torque, shorter for more power. and additionally. we can dial in your plenum volume.