The ATI balancer is a custom tuned, heavy duty, elastomeric balancer that is designed to attenuate vibrations at higher rpm- not just rpm where NVH is an issue. The ATI balancer is SFI approved and will possibly improve bearing and crank life for continual high rpm use.
The RBC manifold really shines on moderately modified 2.4-liter engines like ours, with its larger plenum and bigger in diameter, shorter runners. The RBC can even out power many race-type aftermarket manifolds.
We had to modify the RBC manifold to fit on our K20Z3 head. It was not too difficult, and the instructions to do it can be found here.
We used a PRL Motorsports throttle body adaptor to bolt it on to the RBC manifold.
With a featherlight weight of 17.2 lbs for the ENTIRE assembly and a small 7.25″ diameter, the ACT twin disc is not only much lighter than even a lightweight high-performance conventional clutch, but it is much lower in inertia as well for more instantaneous throttle response.
With a lot of friction area, a twin disc can offer a lot of torque capacity without having to increase the pressure plate clamp load as much. This is easy on the clutch pedal and the engine’s thrust bearing. The ACT Twin Disc can hold 770 ft/lbs, which is 314% better than stock.
With two discs, the size of the disc can also be reduced for lower inertia as well for fast revving and a quick response. The ACT clutch is SFI 1.2 certified and has a one year warranty to boot!