This kit, the TCK265P, includes a T265 Timing Belt, a T42121 Cam Idler Pulley, a T43008 Tension Pulley, two KS13709 Cam Seals and a KS12711 Crankshaft Seal. All of the components, except the T265 timing belt, can be purchased separately, so if you'd prefer to use the T265RB Gates Racing Timing Belt (sold separately) you can still assemble all of the parts you need to do the job properly. It is highly recommended that you replace the KS14477 Crank Seal and the two KS13429 Cam Seals (two shown) at the same time as the other timing belt components.. When replacing the Timing Belt it is suggested that you also change the 43500 Water Pump (sold separately), at the same time because the Water Pump is driven by the Timing Belt.