COMP Cams K12-209-3 Dual Energy Hydraulic Flat Tappet Camshaft K-Kit - 275H

The COMP Cams K12-209-3 Dual Energy 275H is a complete hydraulic flat tappet camshaft K-Kit engineered for Chevrolet Small Block 262-400 c.i. engines (1958–1998). This K-Kit builds on the Dual Energy camshaft grind by bundling the camshaft with a matching lifter set and timing set, giving you everything needed for a complete cam swap in a single package.

The Dual Energy grind is purpose-built with more exhaust duration and lift than the intake side, a strategy designed to unlock mid-range and upper-RPM horsepower in engines constrained by restrictive exhaust systems or stock exhaust ports. By biasing the exhaust lobe profile, this cam compensates for exhaust flow limitations that would otherwise leave power on the table, making it an excellent choice for street/performance builds retaining stock or near-stock exhaust components.

Key Specifications:

• Cam Type: Hydraulic Flat Tappet
• Grind Number: 275DEH
• Advertised Intake Duration: 275°
• Advertised Exhaust Duration: 277°
• Duration at .050" Lift — Intake: 219° / Exhaust: 229°
• Intake Valve Lift: 0.462"
• Exhaust Valve Lift: 0.482"
• Lobe Separation Angle: 110°
• Basic Operating RPM Range: 2,000–6,000
• Camshaft Material: Cast Iron
• Cam Gear Attachment: 3-Bolt
• Engine Family: Chevrolet Small Block 262–400 c.i. (1958–1998)

Kit Notes:

• Lifters: Included
• Timing Set: Included
• Assembly Lubricant: Included
• Valve Springs: Not included — upgraded valve springs are required

With a choppy, performance-oriented idle and an operating range that stretches to 6,000 RPM, the K12-209-3 delivers a noticeable performance upgrade while remaining compatible with a stock torque converter. It is ideal for high-performance street builds where exhaust flow is a limiting factor.