K20 Upper Coolant Housing w/Optional Filler Neck




  • K20A cylinder heads
  • K20A2 cylinder heads
  • K20A3 cylinder heads
  • K20Z1 cylinder heads
  • K24A1 cylinder heads
* There is a fitment issue with the K20 upper coolant housing and Jackson Racing Supercharger.
We have brought back our K20 housing w/optional filler neck. We have made some changes to the design.  We have kept a lot of the basic features like the 1/8NPT temp sensor port and recirculation fitting. The housing seals to the head using an o-ring to ensure no leaks. We supply the mounting hardware and plugs for both ports. We changes the assembly process by using threaded ports and o-rings to making switching between filler necks and fittings quick and easy. The filler neck offers a 2 position locking pin. This is designed to locate the filler for standard motor setup or for lean motors.

Additional information

Add Filler Neck

Add Filler Neck w/16AN Fitting [+USD $79.99], Add Filler Neck w/Hose End Fitting [+USD $79.99], No, basic housing only


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