Xtreme Energy 274H Hydraulic Flat Tappet Camshaft Complete Kit
Lift: .552"/.555''
Duration: 274°/286°
RPM Range: 1800-6000


In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16' wide x 7/64' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.

High performance street, very strong mid-range, with headers & stall.

Operating Range:	1800-6000 RPM
Duration Advertised:	274° Intake / 286° Exhaust
Duration @ .050' Lift:	230° Intake / 236° Exhaust
Valve Lift w/1.7 Rockers:	.552' Intake / .555' Exhaust
Lobe Separation Angle:	110°

Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572


High performance street, very strong mid-range, with headers and 2200+ stall.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART