Z3-Cooling

Are you looking to push some serious air? There is no denying that BMW does not always have the best cooling systems. In fact one of the first thin...

BMW isn't known to have the most robust coolant systems, but most of this can be fixed with regular preventative maintenance.  If you want to take ...

A very popular upgrade for track cars. By replacing your original 92 degree thermostat with a 80 degree thermostat, you are allowing the coolant to...

Bleeding your M5x engine can be a nightmare at times. BMW set up their cooling system with an external reservoir and bleeder screw. The problem wi...

The plastic bleeder screws that come standard on BMW cooling systems do their job pretty well. However, they can strip pretty easily if you're not ...

BMWs definitely aren't known for their cooling systems, but you don't have to lose sleep over it. All of these cars by now have seen quite a few mi...

A very popular upgrade for track cars. By replacing your original 92 degree thermostat with a 71 degree thermostat, you are allowing the coolant to...

The fan clutch delete modification on E36 6 cylinder engines (M50, M52, S50, S52), has become a very popular modification. By deleting the OEM fan ...

What do you get the guy that has everything? The final touch to his fan clutch delete. This machined cap is anodized black and covers the threads o...

The OEM BMW water pump pulley on the M5x series of engines is plastic and can easily become brittle and break.  We have been selling our aluminum w...

The aluminum thermostat housing for the M5x/S5x engine familly is a very common upgrade. The stock thermostat housing is plastic and can crack ove...

The stock water pump pulley is plastic from the factory and has been known to crack over time from heat cycles and stress. The water pump is an imp...

**These radiators are getting very hard to get, and come in and out of stock very fast. If you are interested, please email us to ask if they are i...

One of a major causes of failure on the BMW E36 is the coolant system.  Since the cooling system runs pretty hot, it is a pressurized system, the u...

Are you looking to convert your OBD2 M52 or S52 to OBD1?  The OBD2 coolant pipe is press fit in with orings, while the OBD1 coolant pipe uses a tra...

Koyorad quality is a direct result of their privately owned factories which allow Koyorad Japan to oversee each stage of radiator production. The n...

NOW IN BLACK COLOR ONLY Looking to easily add an oil cooler to your M5x (M50, S50, S52) engine? Look no further. This beautiful CNC'd aluminum oil ...