COMP Cams Engine Push Rod Length Checking Tool

Get Valvetrain Geometry Right the First Time with COMP Cams Pushrod Length Checking Tools

Correct pushrod length is one of the most critical — and most overlooked — factors in building a healthy, high-performing valvetrain. Run a pushrod that is too short or too long and you risk improper rocker arm geometry, accelerated wear on valve tips, and lost power across the entire RPM range. COMP Cams, widely regarded as the absolute leader in valvetrain technology, engineered their line of Engine Pushrod Length Checking Tools specifically to take the guesswork out of this critical measurement — before you ever order a permanent pushrod.

Two Trusted Product Lines: Hi-Tech and Magnum

COMP Cams offers two primary series of pushrod length checkers, each designed with a specific workflow in mind.

• Hi-Tech Checking Pushrods — These precision tools are crafted from steel alloy and finished in black oxide for durability and corrosion resistance. Each checker is adjustable in .050" increments per revolution, and the stamped gauge length on the body makes reading your measurement fast and intuitive — no expensive calipers required. Individual Hi-Tech checkers cover specific ranges, while the Hi-Tech Master Checking Pushrod Kit bundles multiple tools to cover a wide span from 5.800" all the way to 9.800", making it ideal for engine builders who work across multiple platforms.
• Magnum Checking Pushrods — COMP Cams' Magnum series checkers follow a slightly different technique: once you dial in the correct length, you compare the checker against a known-length standard using a common pair of 6" calipers to confirm the difference. This approach gives builders a second method for validating their measurements and is especially handy when working in tight spaces.

Why COMP Cams Measures Differently — and More Accurately

One reason COMP Cams pushrod checkers stand apart is the company's commitment to gauge length measurement rather than simple "actual length." Actual length measurements are thrown off by oil hole diameters and chamfers at each end of the pushrod. COMP Cams uses a standardized .140" gauge diameter to eliminate those variables, delivering the most reliable measurement possible. All of their Magnum and Hi-Tech pushrods — permanent and checking alike — are measured using this same gauge length convention, so the number you determine with your checker maps directly to the part number you order.

COMP Cams pushrod length checkers feature ball-ball ends, mirroring the geometry of production pushrods so that you can actually rotate the engine over during fitment and observe the rocker arm-to-valve tip relationship in real time as you adjust length. When you've achieved the correct geometry — rocker tip traveling from the intake side, across the center of the valve tip at mid-lift, to the exhaust side at full lift — you simply read the stamped gauge length and place your order with confidence.

Built by the Brand That Wrote the Book on Valvetrains

COMP Cams has been a cornerstone of performance valvetrain engineering since its founding in 1976, developing innovations like the Spintron engine testing system, Pro Plasma Nitriding for camshafts, and Micro Surface Enhancement (MSE) finishing technology. That same dedication to precision extends to their measuring tools. Whether you are building a mild street engine or a full-competition race motor, using a COMP Cams pushrod length checker ensures your valvetrain geometry is dialed in correctly — the first time.