Cooling System Parts

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Radiators
	The Koyo radiator features an aluminum core with 2 1/16" thickness for extra cooling capacity. The surface is polished to an attractive shine for great underhood looks. Fits 04-08	V2695KO
Image Soon	New OEM Radiator for Manual Transmitions Fits 04-08	15-200B-N3H4
Image Soon	New OEM Radiator for Automatic Transmitions Fits 04-08	15-200D-N3H6

Radiator Caps
Image	Year/Model	Part Number
	04 - On (Pressure cap)	15-2050-D316

	04 - On WATER EXPANSION TANK	15-351G-N3H1

Radiator Hoses and Thermostats (OEM)
04-08	Lower Radiator Hose	15-185B-N3H1
04-08	Upper Radiator Hose (front half)	15-186C-N3H1
04-08	Upper Radiator Hose (rear half)	15-186B-N3H2
04-08	Thermostat	15-1710-N3H1
04-08	Thermostat Gasket	10-1530-N3H1
04-On	Thermostat Cover	15-170C-N3H1	Image Soon
04-On	Thermostat Housing	15-1H0B-N3H1	Image Soon

Agency Power Silicone Radiator Hoses
Silicone hose resists chemical and heat damage and lasts many times longer than standard rubber hose. Sold in black and red for the perfect engine compartment accent. Includes the lower hose and front half of the upper hose.
Red	8-SILHOSE-RED
Black	8-SILHOSE-BLACK

Racing Beat Silicone Radiator Hose Kit
Description	Part Number	Image
Full Radiator Hose Kit	11486

Metal Water Outlet
Metal Water Outlet - Rear Housing to Heater Hose This tube is pressed in, and needs to be removed and discarded in order to lap the rear side housing when rebuilding the engine.	10-C710-N3H1

Water Pump
	RX8 Water Pump	15-100B-N3H1
	RX8 Water Pump Gasket	15-1160-N3H1

Water Temperature Sensor Adapter
	The Water Temperature Sensor Adapter allows for easy installation of a sender unit for most popular aftermarket gauges (3/8-inch female pipe). The machined-aluminum adapter will accommodate either mechanical or electrical senders. The adapter mounts on the heater hose in the engine compartment and can be easily installed in just a few minutes. Includes mounting hardware and installation instructions.	11493

Oil Cooler and Radiator Inlet Screens
These stainless steel mesh screens provide excellent protection against road debris while enhancing the appearance of your RX8.
	Oil Cooler Screens (sold individually)
	04-08	11807
	2009	11808
	Center Radiator Screen	11805

Underdrive Eccentric Shaft Pulley
Quicker throttle response, increased horsepower, and improved drivability are just some of the characteristics the under drive pulley kit offers for the Mazda RX8. The pulley is anodized in Brilliant Blue or Silver Bright Dip. The pulley is roughly 20% reduced from the factory component. By having a lightweight and under driven pulley, it will offer much needed throttle response and increase of about 9HP. Each pulley includes new hardware for a bolt on installation and brand new belts for a perfect fit.
Silver Brite-Dip	AP-RX8-130-S
Blue Anodized	AP-RX8-130-B