B16a2 172hp 112 torque B16a2 NA Stage2 Comp Cams 57200 Comp Cams springs 913-set S2 titanium retainers S2 lost motion springs B16a2 valves Brass valve guides Portflow ported head Nippon 81.5 ctr pistons Balanced crank assembly 70mm S2 throttle body Skunk2 intake manifold ported 70mm Injen air intake DC sports header Simons 2.5" cat back exhaust (no cat) Walbro 255lph pump RDX injectors Hondata v3