Smith Brothers NH36B-DD Stage 1 Performance Pushrods — 1994–2003 7.3L Powerstroke

Stop bent pushrods before they cost you a weekend. These Smith Brothers NH36B-DD Stage 1 rods are a drop-in upgrade for 1994–2003 Ford 7.3L Powerstroke engines that have moved past stock injectors and mild boost.

Factory 7.3 pushrods are long (~10.24") and relatively thin. Larger injectors, hybrid nozzles, higher cylinder pressure, and extra RPM put that column under a load the OEM parts were never designed to take. The result is deflection, bent rods, misfires, popping from the intake or exhaust, and a rough idle. These rods are built to stay straight.

Smith Brothers has made custom pushrods in the USA since 1953. Their parts show up in NASCAR engines (including Childress Racing) and in daily-driven diesels that actually get used.

What’s included

Full set of 16 — enough to replace every intake and exhaust pushrod.

Specs

• Part number: NH36B-DD
• Material: Heat-treated 4130 chromoly tubing
• Diameter: 3/8"
• Wall thickness: .065" (Stage 1)
• Ends: 3/8" ball / 3/8" ball
• Oil-through design
• Length: Stock (direct replacement)
• Fitment: 1994–2003 7.3L Powerstroke (F-250, F-350, F-450, F-550, Excursion, E-Series)
• Made in the USA

Who they’re for

• Trucks with modified injectors larger than Stage 2
• Hybrid injector setups
• Higher-boost or power-adder builds
• Anyone replacing pushrods during a head-stud / spring job and wanting more margin than stock

They are not the heaviest Smith Brothers 7.3 option. If you are running larger hybrids, or chasing serious horsepower, look at the thicker-wall Stage 2 (NH312B-DD, .120" wall) instead.

Recommended supporting parts

• ARP head studs
• Upgraded valve springs (Comp 910 is the common pairing)
• Proper valve adjustment after install

These are a direct replacement. Use the factory service manual (or equivalent) for removal, installation, and lash/preload.

Why upgrade now

A bent pushrod rarely happens at idle. It happens when the turbo is lit and cylinder pressure is highest. Stiffer rods keep valve timing consistent and protect the rest of the valvetrain. Customers running these with upgraded springs and 238-class injectors report the rods staying straight when the engine is making power.

Smith Brothers NH36B-DD — Stage 1 strength, stock length, USA-made. The sensible upgrade before the factory rods become the weak link.