Comp Cams Replacement Adjusting Nut Set for Magnum Roller-Tip Rockers — 3/8" Stud, Made in USA

COMP Cams 1400N-16 Replacement Adjusting Nut Set provides direct-fit replacement adjusting nuts for Magnum roller-tip rocker arms with 3/8" studs.

These replacement adjusting nuts are designed as a direct service part for COMP Cams Magnum rocker arms, intended to restore or maintain proper valve-train adjustment where 3/8" studs are used. Manufactured in the United States, this nut set offers the same form factor and fitment as the original hardware, making it a straightforward swap for mechanics and engine builders who want to keep their rocker assemblies functioning as intended.

Will these nuts fit my Magnum roller-tip rocker arms?

Yes—these adjusting nuts are manufactured to replace the original COMP Cams hardware on Magnum roller-tip rockers that use 3/8" studs. They follow the same dimensional standards as the factory pieces to ensure reliable thread engagement and clearance.

• Specifically made for COMP Cams Magnum roller-tip rocker assemblies
• Compatible with 3/8" stud diameter rocker setups
• Sold as a set for straightforward replacement of worn or missing nuts

How do I install the 1400N-16 adjusting nuts correctly?

Installation follows standard valve-train adjustment procedures: remove the rocker assembly if necessary, replace the old nuts with these new ones, and set lash or preload per your cam and engine specifications. Use proper torque and feeler/gap tools to ensure final adjustment is accurate.

• Clean threads before installation to avoid cross-threading
• Hand-start each nut, then torque to specification or adjust by manufacturer procedure
• Re-check valve lash or preload after a short break-in run

What materials and origin should I expect from this part?

The 1400N-16 adjusting nuts are produced in the United States and engineered to match OEM-style composition and fitment. The package is compact and lightweight, suitable for workshop inventory or service kits.

• Made to COMP Cams fit and finish standards in the United States
• Packaged small for easy storage or shipment—lightweight at roughly 0.45 lb
• Universal-fit style packaging for distribution and replacement use

What should I check after replacing the adjusting nuts?

After replacement, confirm that rocker arm geometry and valve lash or preload match your camshaft and valvetrain recommendations. Inspect for correct thread engagement, secure seating against the rocker, and no interference with adjacent components.

• Verify thread engagement and torque settings
• Confirm valve lash or preload with engine at operating conditions as required
• Check for clearance between rocker, pushrod, and valve spring retainer

Who is this for: This adjusting nut set is aimed at do-it-yourself mechanics, professional engine builders, and service technicians who maintain or rebuild engines using COMP Cams Magnum roller-tip rocker arms with 3/8" studs. It’s useful when original nuts are worn, rounded, lost during disassembly, or when keeping a stock-style rocker assembly operating within spec is the goal. If you run aftermarket rocker arms from COMP Cams and need a precise, OEM-matching replacement nut set, the 1400N-16 is a straightforward component to have on hand.