Quote:
Originally Posted by redondoaveb
1) The OS Giken is tuned from the factory for stock power and street use. It definitely needs to be tuned for track use, and/or higher than stock power
2) I completely agree with you on the Z1 cover. I scrapped mine for my new build and had a Nismo cover installed instead.
3) Rob Fuller from Z Car Garage runs OS Giken's on all of his race cars, including his IMSA car and doesn't run an oil cooler on any of his cars and has never had a diff failure. Take that for what it's worth but he's a reputable source.
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I puked diff fluid out the vent tube of my OS Giken on the Tail of the Dragon. In my eyes, you need it. Plus, your diff fluid last longer. No need to change it after every track day.