Race Tech Gold Valve Combo G2-R FMGV 3423GC The G2-R Combo Kit includes both a G2-R Compression as well as a Rebound / Mid-valve Gold Valve Kits. Keep in mind that the G2-R Gold Valve is the Tuners Valve. This means it requires more skill to setup but is more versitile. If you are not a skilled tuner select the Type 1 Gold Valve. Some people choose to do just the Compression Gold Valve Kit however the Rebound Gold Valve works very closely with the Compression to create the optimum damping curve.