Cooling
The stock cooling system of the GR86 does a decent job. Under high load and RPM the stock cooling system can benefit from some help particularly in a hot climate. Stock radiators while good often do not offer the same cooling potential as a quality aftermarket aluminum radiator. An often overlooked fluid to cool is your oil. Unless you have a oil temp gauge installed you are likely unaware of your oil temps. Properly cooling your oil will allow your oil to properly do its job of lubricating your engine.
