SKU: COM8959-2
UPC: 036584207894
MPN: 8959-2
The Chevy 348/409 Retro Fit Hyd Roller Lifters from COMP CAMS are purpose-built hydraulic roller lifters designed to retrofit classic and vintage Chevrolet big-block engines with modern valvetrain reliability. These lifters address the needs of engine builders and enthusiasts who want to upgrade their W-Series GM powerplants with contemporary roller technology while maintaining original engine architecture. By converting from flat-tappet to hydraulic roller design, builders gain reduced friction, improved valve control, and extended component life—all critical for both street and performance applications.
These hydraulic roller lifters feature a 0.842-inch outside diameter and incorporate a link bar design that ensures synchronized lifter motion and eliminates the wear patterns associated with traditional flat-tappet designs. The hydraulic mechanism automatically maintains zero valve lash, reducing noise and compensating for thermal expansion without manual adjustment. Roller lifters inherently produce less drag than their flat counterparts, which improves fuel efficiency and allows the engine to breathe more freely at higher RPM ranges. The compact 3.9 x 1.1 x 4.25-inch dimensions integrate seamlessly into the existing block and head geometry of W-Series engines, with each pair weighing just 0.63 pounds for minimal reciprocating mass.
These retrofit lifters are ideal for restorers and performance builders working with Chevy 348 and 409 cubic-inch engines who refuse to compromise on modern engine management and reliability. Installation pairs perfectly with updated cam profiles, pushrods, and rocker arm systems to unlock the full potential of classic big-block power. Whether you're rebuilding a vintage Chevrolet Impala, truck engine, or race application, the Chevy 348/409 Retro Fit Hyd Roller Lifters deliver the precision and durability expected from COMP CAMS' heritage of valvetrain innovation. A pair is included in this SKU, providing everything needed to equip one complete engine retrofit.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
