Specifically designed for use w/ JESEL and similar external, dry timing-belt, cam drive systems. Includes 3 wire hall-effect sensor (8-20 volts), anodized billet aluminum bracket, mounting hardware, mating connector, and stainless steel 1/4"-20 "flying magnet" screw w/ high-temp, rare-earth magnet.Features: Fits Small Block Chevy engines w/ JESEL and similar external, dry timing-belt, cam drive systems Includes 3 wire hall-effect sensor (8-20 volts), anodized billet aluminum bracket, mounting hardware, mating connector, and stainless steel ¼”-20 “flying magnet” screw w/ high-temp, rare-earth magnet Unique t-nut and bracket design allows for complete sensor adjustment from the outside of the bracket with a single jam nut Designed to provide a plug-&-play cam position signal to Holley EFI systems, Also compatible with any EFI system which can read a digital, square-wave cam input signal Bracket assembly can be mounted in up to five locations to accommodate various cam-drive systems and front accessory drive configurations Specs: Bolt Hole Quantity: 2 Brand: Holley EFI Category: Ignition Color: Black Emission Code: 4 Grade Type: Performance Mounting Bracket Included: Yes Mounting Hardware Included: Yes Mounting Type: Bolt On Part Type: Engine Camshaft Position Sensor Product Type: Hall Effect Cam Sync Sub Category: Sensors Wire Quantity: 3 Tech Resources: Instructions - 199r10801.pdf