ACT 06-15 Mazda MX-5 4 Pad Sprung Race Clutch Disc 2007-mitsubishi-eclipse-esi5191010 Bright-dipped R5 and anodized green

Bright-dipped R5 and anodized green for superior resistance to engine coolant

low thermal conductivity

the rumors are true - they don't matter once you remove the backpressure issues of the stock configuration (and you can't open the valve yourself anyway)

25" in diameter to keep airflow velocities high

Invidia 15+ Subaru WRX/STi Titanium Tip Bead Blasted Cat-back Exhaust

ACT 06-15 Mazda MX-5 4 Pad Sprung Race Clutch Disc 2007-mitsubishi-eclipse-esi5191010 Bright-dipped R5 and anodized greenAggressive engagement, quick shifts, OE to mild gear rattle; Premium ceramic friction materials provide moderate wear rates and high heat tolerance; Utilizes wraparound spring windows, thicker retainer stampings and a heat treated, spring steel drive plate to provide support, reduce stress concentrations and increase strength and reliability; Recommended for race use only; High burst strength and holds 28% more torque than typical organic materials