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Manley Pro Series I-Beam Connecting Rods 15559-8 Rod, 4340 Steel, I-Beam, 6.125 in Length, Bushed, Cap Screw, Chevy, LS1, Each

SKU: MAN15559-8

Connecting Rods

Manley Pro Series I-Beam Connecting Rods 15559-8 Rod, 4340 Steel, I-Beam, 6.125 in Length, Bushed, Cap Screw, Chevy, LS1, Each

SKU: MAN15559-8

Connecting Rods
A$6,575.26
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

Manley Chevrolet LS Pro-Series I-Beam Connecting Rod Set - 6.125in Length

Manley Pro Series I-Beam Connecting Rods represent the epitome of precision, performance, and quality. Engineered with meticulous attention to detail and a finely tuned manufacturing process, these rods are a testament to our commitment to excellence. Elevate your engine's capabilities and achieve outstanding results with these exceptional connecting rods.

Additional Information

Center To Center Length: 6.125 in. - Big End Bore: 2.225 in. - Pin Bore: 0.9281 in. - 7/16" ARP 2000 Bolts - Material: 300M - Approx. HP Rating: 1500+ (Oval) / 1800+ (Drag)

Part Type

Engine Connecting Rod Set

Data: v4.2 - Upd: 2026-11-11 23:13:56

Features

  • Designed for ultimate performance with superior materials: forged 4340 or 300M vacuum degassed steel alloys
  • NHRA Legal Certification for some SKUs - Stock and Super Stock
  • Versatile Weight Options: Tour Lites, Light, Standard, Heavy

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

(keyword: rods)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Downloads

# Document Type Download
1. Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-08 05:29:56

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Manley Performance, Manley
StreetFX SKU man15559-8
SFX Item ID 4930697
Accounting SKU man-15559-8
Manufacturer SKU 15559-8
Manufacturer UPC 807298113371
Alternative References 15559-8, MAN-15559-8

Connecting Rod, 4340 Steel, I-Beam, 6.125 in Length, Bushed, Cap Screw, Chevy, LS1, Each

Manley Pro Series I-beam connecting rods are forged from 4340 aircraft-quality vacuum degassed material. They're fully machined to produce the strongest rods possible. These rods are shot-peened to Mil specs and are 100 percent individually magnafluxed. They feature 7/16 in. ARP cap screws with 12-point heads and your choice of material grade to maximize your needed tensile strength! Manley Pro Series I-beam connecting rods are available in various sizes for a wide range of vehicles and horsepower ranges from 850 to 1,600 hp. Match up your specs, then order an individual rod or a larger set quantity.

Product Attributes
BrandManley
Manufacturer's Part Number15559-8
Part TypeConnecting Rods
Product LineManley Pro Series I-Beam Connecting Rods
UPC807298113371
Connecting Rod Length Center to Center (in.)6.125 in.
Connecting Rod Beam StyleI-beam
Connecting Rod MaterialForged 4340 steel
Wrist Pin StyleFloating
Pin End Bore Diameter0.928 in.
Big End Bore Diameter (in.)2.2250
QuantitySold as a set of 8.
Cap Retention StyleCap screw
Big End Width (in.)0.940
Clearanced for StrokerYes
Connecting Rod Bolt BrandARP
Connecting Rod Bolt Diameter7/16 in.
Connecting Rod Bolt MaterialARP2000 alloy
Fastener Tensile Strength (psi)200,000 psi
Connecting Rod Bolt Head Style12-point
Approximate Connecting Rod Weight (g)690
Advertised Horsepower Rating1,500 hp
Pin End Width (in.)1.000 in.
Weight Matched SetYes
RemanufacturedNo
MagnafluxedNo
Connecting Rod ColorShot-peened
NotesCustom pistons are required when using connecting rods with any length other than OE.

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