COMP Cams · New
COMP Cams Pro-Mag Hydr Lifters Chevy SB
MPN 858-16 · Store SKU cca858-16
Supplier stock checked 11/7/2026, 2:13:46 PM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
Pro Magnum Hydraulic Flat Tappet Lifters. Specifically designed to perform at higher engine speeds. Proper position of internal piston at higher RPM prevents lifters from harmful "pumping up". Unique design yields significant power increase over standard hydraulic lifters. Adjustable valve train required. Pre-load .002"-.004" with engine warm. Applications: Chevrolet, Small Block V8 265-400, Big Block V8 396-454, Big Block V8 348-409 ('58-'65). Specifications: .842" Diameter - 99g Weight - 1.93" Seat Height. These Pro Magnum hydraulic lifters are designed to perform at high RPM without any harmful pumping up. These lifters for Chevrolet Small/Big Block and 348-409 yield significant power increase over standard hydraulic lifters. Pro Magnum Hydraulic Flat Lifter for Small and Big Block Chevrolet.
Manufacturer fitment & guides
Check 858-16 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
