Water Restrictor

These nifty tuning devices push into the center of your ECD54 or C43 Laminova water-to-oil cooler to alter the amount of coolant bypassing the oil cooling sections.
 
By installing the full restrictor, almost all coolant flowing through will be diverterted to the oil cooling sections. A pinhole is in it as well to bleed air bubbles.
 
The partial restrictor lets some coolant bypass the oil cooling sections.  
 
C43 coolers avaialble [HERE]
ECD54 coolers available [HERE]
 
We recomend running at least a partail restrictor if you are not using a high flowing electric water pump.