Tomei Valve Guide Set - Mitsubishi 4G63 Seats & Rails With our Exoracing block breather

With our Exoracing block breather fittings

you can also use high-grip radial tires for circuit driving

The body's machined from 6061-T6 aluminum and the internal components are 304 stainless steel

Designed to offer a sporty exhaust sound and carry less weight than OE systems

Tomei Valve Guide Set - Mitsubishi 4G63 Seats & Rails With our Exoracing block breatherWe chose to use Phosphor Bronze (Cn Sn P alloy) to make our Valve Guides, for its highly tensile and superior heat transferring ability, which is vital, Intake, high power and high RPM outputting engines. Since race engines these days require more power at higher RPM use , these engines now experience more extreme heat conditions. These conditions will increase the deterioration rate on these valve train related components. The Phosphor Bronze