These Hi-Tech hydraulic lifters from Comp Cams have a greater bleed rate, which greatly increases vacuum, throttle response and decreases valvetrain noise. They are designed primarily for street machines or racing applications where a vacuum rule is in place, or where you must run a hydraulic camshaft.
Variable duration, not intended for extended periods of street use..
FEATURES:
Greater bleed rate increases vacuum
Increased throttle response for extremely hot street & racing applications
Not recommended for extended periods of street use