Looking for aftermarket parts to modify or upgrade your 1999 Lexus GS300 with thermostats? At Tunersports.com we carry a huge selection of the top name brand performance thermostat parts and accessories for your GS300.
Whether you have a 1999 Lexus GS300 in Base trim we have you covered. We have 3 thermostats available to mod your GS300. All parts have free shipping to the Continental US 48 States.
 IN STOCK MMTS-SUP-93TLThe Mishimoto racing thermostat will promote greater cooling efficiency throughout your engine and will significantly lower high engine temperature produced by modified and upgraded turbo applications.Once the engine is fully warmed up the Mishimoto racing thermostat will open up at a lower temperat... Mishimoto 93-98 Toyota Supra / 04-06 Scion xA 155 Deg F/68 Deg C Racing Thermostat 1993-2005 Lexus GS300 Base $82.76 |
 IN STOCK MMTS-TC-05LThe Mishimoto racing thermostat will promote greater cooling efficiency throughout your engine and will significantly lower high engine temperature produced by modified and upgraded turbo applications.Once the engine is fully warmed up the Mishimoto racing thermostat will open up at a lower temperat... Mishimoto 05-10 Scion tC 155 Deg F / 68 Deg C Racing Thermostat 1993-2005 Lexus GS300 Base $73.73 |
