These are Johnson's short travel slow leak down race-style lifters with axle oiling for all LS engines not running DOD/AFM.  These do use a tie bar, so you will remove the plastic lifter trays for these lifters.

Features:

•  Hydraulic-Roller
• .058" Total Plunger Travel
• .030" Recommended Pre-Load +/-.005"
• Set of 16 Lifters