Fuji Racing Cylinder 4 Cooling Modification

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  • Regular price $96.25
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The Fuji Racing Coolant modification for the Subaru EJ Series Engines was designed to reduce the coolant passage ‘dead spot’ which is located over cylinder 4. Basically, this kit allows the coolant to travel through the cylinder 4 passage and recirculate around the cooling system. What this does is balance out the cylinder temperatures which in turn allows for a more equal fuel and timing map on the car So now that all 4 cylinders are running at similar temperatures this will help reduce cylinder knock & detonation. This kit is Dyno Tested and proven to work !!


Suitable for the following models:

  • Subaru EJ turbo engines

If you are unsure of fitment or application then please contact us with your vehicle's chassis number.




  • 1 x Pre Cut Hose
  • 1 x Custom Made Hose
  • 1 x T-Piece
  • 1 x Billet cylinder head reducer
  • 1 x 45 Billet hose fitting
  • 4 x Spring Clips
  • PDF Fitting Instructions
OUT OF STOCK? No worries, a backorder is available.
Simply send us a message on the inquiry screen "here" and we can manually process your back order and supply time frames.

    PLEASE NOTE: ALL PARTS ARE SUBJECT TO AVAILABILITY unless stock level indicated on product page.