What material are these connecting rods made from?

These Manley Pro Series connecting rods are made from forged 4340 vacuum degassed steel alloy. This material is chosen for its strength and durability under high engine loads.

What size are the connecting rod bolts included?

This set includes 7/16 inch ARP 625+ connecting rod bolts. ARP 625+ bolts are known for their high tensile strength and reliability in performance engine applications.

Are these rods suitable for a stock engine rebuild?

While these are high-performance rods, they can be used in a stock engine rebuild if you are aiming for increased power output or durability. However, they are most commonly used in modified or performance-oriented engine builds where their strength and specifications are beneficial.

Specifications

Brand: Manley Performance
Part #: 14159R6-8
UPC: 807298114446

Manley SBC .025in Longer LS/LT1 6.125in Pro Series I Beam Conn Rod 7/16in ARP 625+ - Set of 8

Name: Manley SBC .025in Longer LS/LT1 6.125in Pro Series I Beam Conn Rod 7/16in ARP 625+ - Set of 8
Brand: Manley Performance
SKU: manley-performance-manley-sbc-025in-longer-ls-lt1-6-125in-pro-series-i-beam-conn-t14-397303
Price: 2721.66 USD
Availability: BackOrder

$2721.66

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley SBC .025in Longer LS/LT1 6.125in Pro Series I Beam Conn Rod 7/16in ARP 625+ - Set of 8. These connecting rods are built for high-performance LS/LT1 engines.

Key Features

Fits SBC LS/LT1 engines.
6.125 inch length, .025 inch longer than standard.
Constructed from forged 4340 vacuum degassed steel alloy.
Includes 7/16 inch ARP 625+ connecting rod bolts.
Sold as a set of 8 connecting rods.
Available in multiple weight options to suit different engine builds.

These connecting rods are designed for SBC LS/LT1 engine applications. Always verify compatibility with your specific crankshaft, pistons, and engine build.

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About this part

Product Details

Manley Performance Pro Series I-Beam Connecting Rods are a top-tier choice for anyone building a high-performance Small Block Chevy (SBC) engine, specifically for LS and LT1 applications. These rods are designed to be .025 inches longer than stock at 6.125 inches, which can be crucial for achieving specific piston-to-valve clearance or compression ratios in a custom build. They come as a set of eight, ready to be installed in your V8 engine.

These rods are constructed from forged 4340 vacuum degassed steel alloy, a strong material chosen for its ability to handle the stresses of high-RPM operation and significant cylinder pressures. They are equipped with 7/16 inch ARP 625+ bolts, which are well-known for their exceptional strength and reliability in demanding engine builds. Manley offers these rods in various weight options to suit different engine builds, from lighter setups for racing to heavier options for more robust applications. Some specific part numbers in the Pro Series line are even NHRA legal for Stock and Super Stock racing categories, indicating their pedigree for serious competition.

When building a performance engine, the connecting rods are a critical component that transfers power from the pistons to the crankshaft. Choosing a well-built set like these Manley Pro Series rods ensures that your engine can reliably handle increased horsepower and torque. It's important to ensure these rods are compatible with your specific crankshaft and piston combination, and to follow proper assembly procedures, including correct bearing clearances and torque specifications for the ARP bolts, to achieve the best results.