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The Circuit Hero high pressure radiator cap uses a 1.3 kgf/cm² spring to increase your coolant/antifreeze boiling point and protect you engine.
An added bonus Circuit Hero incorporated is the built-in button valve. To ensure there is no hot heat pressure built up, always press the button to make sure there is no hot vapors in your radiator. Pressing the button also allows hot vapors your to escape for quicker cooling.
- High pressure spring to raising engine boiling point
- Safety button to reduce chance of being burned
- Release hot vapors to cool down engine faster
- Silver and black cap color option
- NEVER OPEN RADIATOR CAP WHEN ENGINE IS HOT!
- 88-91 Civic/CRX (EF)
- 90-93 Integra (DA)
- 92-96 Prelude
- 91-05 NSX (NA1/2)
- Most Mazda, Mitsubishi, Nissan, Subaru, Scion (FRS)
- Recent in-house fitment testing showed this cap is NOT fitment friendly with Mishimoto, Koyo, and CSF radiators.
- 92-00 Civic (EG/EK)
- 06-15 Civic (FB/FG)
- 94-01 Integra (DC)
- 18+ Accord 1.5T (CV1) / 2.0T (CV2)
- 02-06 RSX (DC5)
- 04-08 TSX (CL9)
- 00-09 S2000 (AP1/2)
- 07-14 Fit (GE8)