The Gasket Genius service kit 4 fits 4500, 5200 and 5800 Chinese chainsaws with 45cc, 52cc and 58cc engines, including Plantiflex, BBT, B&Q, Silverline, Kiam Sherwood, Sanli, Rok, Whitemoss, Skatco, Eckman, Timbertech, Tarus, Viron, MT and Trueshopping Raptor. The fourth kit variant for this engine platform — individual component profiles differ from kits 1 and 2, so confirm against your existing parts and the product images before ordering. All key consumable and wear items are included in a single purchase, covering the air filtration, fuel delivery, oil delivery and ignition circuits alongside the oil pump worm gear and sealing gaskets.