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Koyo is Japan's largest aftermarket radiator manufacturer. Koyo radiators are produced from aircraft quality aluminum. The end tanks are welded on for superior durability. The core is twice as thick as the factory radiator giving 30% more cooling than factory. Fully polished to a mirror finish. Great for cars seeing moderate to high track use, or high horse power, high boost applications, and cars seeing aggressive driving in high temperature climates. Custom built for an OEM fit; all Koyo Radiator cores and tanks are specifically designed and built for each application. No universal fit parts are used. This helps to ensure a proper fit, just like OEM. The 04 - 07 WRX & STi Radiator requires the use of a Koyo Radiator cap which is sold separately. The OEM radiator cap will not fit. 2002 - 2003 WRX Radiator
These radiators do not have a cap on the radiator itself. If your radiator has all ready been replaced with the up-dated factory radiator that has a cap on it, you will need the 04-07 WRX/STI Radiator.
04-07 WRX and 04 - 07 STI Radiator
This radiator requires the use of a KOYO Radiator Cap (sold seperately). The OEM cap will not fit.
2008 - 2010 Subaru WRX (5-Speed)
2008 - 2010 Subaru WRX STi (6-Speed)
Koyo 1.3 Bar Radiator Cap
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