Tappet Conv Kit,Hi-Performance Shovelhead All Yrs 7/16"Od Chrome-Moly........Mfg.6600-Sp Convert your hydraulic tappets which are known to float at high RPM to solid adjustable tappets. We put the adjuster into the tappet body with a design to increase the stability of the pushrod at greater angles. A tapered split locknut is used for the best possible way to lock the adjusting bolt into the lifter body. A 5/16-32 extra fine thread is used for easier and closer adjustments. All pushrods are long enough to accommodate engines with stroker cylinders. All wear surfaces are hardened for maximum durability. Available 1/2 O.D. 6061-T6 aircraft aluminum and 7/16 O.D. 4130 aircraft Chrome-MolyHARDWARE 7/16 O.D. Kit Fits Shovelehead, all years
Tappet Conv Kit,Hyd To Mech Shovelhead All Yrs Change From Hyd To Mech Tappets..Mfg .6600 The installation of this hydraulic to mechanical conversion lot will correct all problems associated with hydraulic tapper and at the same time substantially reduce valve trim weight. Made of 1/2 O.D. seamless 6061-T6 aluminum tubing with a wall thickness of .058. Kit includes four adjustable pushrods, springs, and hydraulic to tappet adjusters.its Shovelhead 1966/1984.