Our Adjustable Cam Gears make it easy to adjust the valve timing on your Acura/Honda B-H-D-F-A series VTEC DOHC SOHC engines! Internal serrated grooves are machined on the inside of the cam gears to prevent slippage. Our Exclusive Patented “Time ‘N Lock” design allows the quickest, most precise adjustments-even at the track! So you can adjust valve timing by 1° or 2° increments then lock it in place. They are machined from aircraft grade 6061-T6 aluminum and Mil-Spec Type II anodized for great looks and durability. Manufactured to match OE profile. A Set includes one intake and one exhaust cam gear plus ARP hardware. Limited one-year warranty.