What is the purpose of a push rod in an engine?

A push rod connects the lifter, which is actuated by the camshaft, to the rocker arm. It transfers the motion from the lifter up to the rocker arm, which then opens the engine's valves.

Why is the wall thickness important for a push rod?

A thicker wall, like the 0.165 inch on these push rods, adds strength and rigidity. This helps prevent the push rod from flexing or bending under the stress of higher engine speeds and valve spring pressures common in performance applications.

What does 'swedged end' mean on these push rods?

A swedged end is a manufacturing process where the end of the tube is compressed and shaped. For these push rods, it refers to the specific forming of the ends that connect to the lifter and rocker arm, ensuring a precise fit and good contact.

Specifications

Brand: Manley Performance
Part #: 25156-8
UPC: 807298029924

Manley Push Rod - 7/16 Dia. - 8.900 Length - 0.165 Wall - 4130 Chrome Moly - Swedged End - Set of 8

Name: Manley Push Rod - 7/16 Dia. - 8.900 Length - 0.165 Wall - 4130 Chrome Moly - Swedged End - Set of 8
Brand: Manley Performance
SKU: manley-performance-manley-push-rod-7-16-dia-8-900-length-0-165-wall-4130-chrome--t14-879800
Price: 215.58 USD
Availability: BackOrder

$215.58

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Manley Performance 4130 Chrome Moly push rod set. Built with a 0.165" wall for added strength in performance applications.

Key Features

Fits: Check manufacturer fitment data to confirm compatibility with your vehicle.
Constructed from strong 4130 chrome moly steel with a 0.165 inch wall thickness.
Features precisely formed ends with exact radii for excellent concentricity.
Closely controlled length ensures consistent valve train geometry.
Heat treated and black oxide finished for durability and corrosion resistance.
Set includes eight push rods, suitable for most V8 engines.

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About this part

Product Details

Starting with a 0.165 inch wall thickness, these Manley push rods are constructed from 4130 chrome moly steel, a material known for its strength and durability. This robust construction is crucial for maintaining valve train stability, especially when you're pushing your engine harder than stock. The 7/16 inch diameter and 8.900 inch length are common dimensions for many performance builds, ensuring a good fit for your application.

Manley paid close attention to the ends of these push rods, forming them with exact radii for excellent concentricity. This means the push rod sits perfectly centered in the rocker arm and lifter, reducing wear and ensuring consistent valve lift. They're also heat-treated and finished with a black oxide coating, which helps protect against corrosion and adds a clean look to your engine bay. This set includes eight push rods, enough for a typical V8 engine.