COMP Cams 896805-1 XD-A Adjustable Chromoly Pushrod 7.320-7.552 In.

The COMP Cams XD-A Adjustable Pushrod delivers a precision-engineered solution for accurately setting valve lash or pre-load in engines equipped with non-adjustable rocker arms. Constructed from chromoly steel with a 5/16 in. tube diameter and ball tips, this single pushrod features a patent-pending two-piece telescoping design that provides a high-performance alternative to traditional adjustable rockers.

How It Works:

The XD-A system incorporates a smaller-diameter top section that slides two inches deep inside a wider bottom section, with one or two shims captured in between. Pushrod length is precisely dialed in over a 0.172 in. total range — from 7.320 in. to 7.552 in. — in 0.004 in. increments using the separately available shim kit (COMP Cams 896801).

Key Features:

• Proven to 9,000+ RPM in solid roller LS applications
• 90% increase in bending stiffness for superior valvetrain stability compared to conventional adjustable pushrod designs
• Enables rocker arm system weight reduction of 30+ grams by eliminating the adjuster screw, threads, and seating support area from the rocker
• Compatible with low-mass, non-adjustable rocker arms for a lighter, more dynamically stable valvetrain
• Drop-in fitment for LS-series engines
• Chromoly steel construction with 5/16 in. tube diameter and ball tips
• Adjustment range: 7.320 in. to 7.552 in. (0.172 in. total range in 0.004 in. increments)
• Sold individually

The XD-A design allows builders to run lighter non-adjustable rockers — such as COMP Cams SPR Radius Tip Rocker Arms — without sacrificing the ability to precisely set lash or pre-load. The result is a more stable valvetrain capable of sustaining higher RPM with greater reliability. Shims are sold separately in individual thickness sets of 16 or as a 240-piece complete kit.