* Lightweight 6061-T6 billet aluminum * CNC machined to .001" * Adjustable +/- 10° * Accurate to within 1 minute of a degree * Easy to read timing marks * 5-bolt pattern for a lifetime of worry-free adjustment * Floating washers prevent bolt damage in adj. slots * Lightening holes reduce weight further * HP / torque gains on stock or aftermarket cams * Hard-Coat anodized belt cog * Gear tooth profile identical to OEM spec * High quality polished & anodized finishes