Skunk2 Alpha Series Subaru EJ25 Connecting Rods

SKU: SKK306-12-1000

Connecting Rods

SK Alpha Connecting Rods

Skunk2 Racing

Skunk2 Alpha Series Subaru EJ25 Connecting Rods

SKU: SKK306-12-1000

Connecting Rods

SK Alpha Connecting Rods

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Description

Alpha Series Rods are forged from select 4340 chromoly steel and feature an H-beam design, resulting in the ultimate strength-to-weight ratio. 4340 chromoly is one of the strongest materials available, however, not all 4340 chromoly is the same. As such, Skunk2 relies on extensive material testing and works closely with its foundry to produce high-quality rods at an affordable price. Comprehensive heat-treating, tempering, and shot-peening processes together ensure that each Alpha Series Rod remains consistent and strong. Finally, each rod is magna-fluxed to ensure integrity and that each process has been completed thoroughly and according to Skunk2's rigid specifications. Skunk2's engineers spent nearly three years developing and testing its H-beam rod design. The results are one of the strongest beam configurations available, capable of handling more than 900 hp. Engineers made use of FEA (Finite Element Analysis) to determine high-stress points and implemented features to reduce wear and increase strength. Skunk2's straight design distributes stress across a larger area when compared to tapered rods, providing additional support where necessary. Alpha Series Rods are manufactured from two-piece forgings, resulting in optimal grain orientation along the rod cap for increased strength. By orienting the metal's grain in the direction of stress along the rod cap, perpendicular to the stress exerted along the beam, strength is significantly increased. Skunk2's two-piece forgings provide a precision-tight fit between the rod's cap and its beam without resorting to the brittle materials required by other processes. Alpha Series Rods also feature dual oil passages at their pin ends, providing additional lubrication and cooling, which leads to an even stronger, more durable rod. Unlike other designs, Skunk2's carefully positioned, offset oil passages help deliver lubrication around the entire wrist pin, during each phase of the engine cycle.

Product Overview

Skunk2 is proud to introduce its all-new Alpha Series Connecting Rods, available for most popular Honda and Acura applications. Alpha Series Rods are forged from select 4340 chromoly steel and feature a straight H-beam design, resulting in the ultimate strength-to-weight ratio. 4340 chromoly is one of the strongest materials available, however, not all 4340 chromoly is the same. As such, Skunk2 relies on extensive material testing and works closely with its foundry to produce high-quality rods at an affordable price. Comprehensive heat-treating, tempering, and shot-peening processes together ensure that each Alpha Series Rod remains consistent and strong. Finally, each rod is magna-fluxed to ensure integrity and that each process has been completed thoroughly and according to Skunk2’s rigid specifications. Skunk2’s engineers spent nearly three years developing and testing its straight H-beam rod design. The results are one of the strongest beam configurations available, capable of handling more than 900 hp. Engineers made use of FEA (Finite Element Analysis) to determine high-stress points and implemented features to reduce wear and increase strength. Skunk2’s straight design distributes stress across a larger area when compared to tapered rods, providing additional support where necessary. Alpha Series Rods are manufactured from two-piece forgings, resulting in optimal grain orientation along the rod cap for increased strength. By orienting the metal’s grain in the direction of stress along the rod cap, perpendicular to the stress exerted along the beam, strength is significantly increased. Skunk2’s two-piece forgings provide a precision-tight fit between the rod’s cap and its beam without resorting to the brittle materials required by other processes. Alpha Series Rods also feature dual oil passages at their pin ends, providing additional lubrication and cooling, which leads to an even stronger, more durable rod. Unlike other designs, Skunk2’s carefully positioned, offset oil passages help deliver lubrication around the entire wrist pin, during each phase of the engine cycle. Connecting rod bolts endure more stress than any other engine fastener. Each Alpha Series Rod features high-quality, Skunk2-branded, 3/8-inch ARP2000 bolts. ARP2000 rod bolts are forged, heat-treated, precision-machined, and capable of clamping loads as high as 220,000 psi. Precision-machined, bronze wrist pin bushings are also fitted to each Alpha Series Rod for increased wear resistance, and are compatible with most aftermarket pistons without additional machining. Not all forged H-beam rods are the same. Only Skunk2’s Alpha Series Rods feature our unique design, precision machining, and are capable of handling more than 900 hp, all at an economical price. *FEATURES:* * Precision Machined * 3/8-Inch ARP2000/Skunk2 Bolts * Shot-Peened For Reduced Fatigue * Bronze Wrist Pin Bushings * Laser-Etched Skunk2 Logo For Authenticity * Fatter, H-Beam Design Without Drastic Weight Increase * Pin End Compatible With Most Pistons Without Machining * Dual-Pin Oil Passages For Increased Lubrication And Strength * 900+ HP Capable * Balanced +/- 1 Gram * Magna-flux Inspected * Heat-Treated * FEA Analyzed

Features and Benefits

Length 130.59mm
Weight 535 Grams
3/8-in. ARP2000/Skunk2 Bolts
Shot-Peened For Reduced Fatigue
Bronze Wrist Pin Bushings
Fatter H-beam Design Without Drastic Weight Increase
Pin End Compatible w/Most Pistons w/o Machining
Dual-Pin Oil Passages For Increased Lubrication And Strength
Balanced +/- 1 Gram
Magna-flux Inspected
Heat Treated
FEA Analyzed

Product Details

Description:	Alpha Series Connecting Rod Set
Length:	130.59mm Weight: 502 Grams
Part Number:	skk306-12-1000
WARNING CA Proposition 65 Message:	WARNING: This product can expose you to chemicals including lead; which is known to the State of California to cause cancer. For more information; go to www.P65Warnings.ca.gov.
WARNING CA Proposition 65:	Yes

Part Type

Connecting Rods

Data: v4.2 - Upd: 2026-10-11 07:26:48

Features

3/8-in. ARP2000/Skunk2 Bolts
Balanced +/- 1 Gram
Bronze Wrist Pin Bushings
Dual-Pin Oil Passages For Increased Lubrication And Strength
Fatter H-beam Design Without Drastic Weight Increase
FEA Analyzed
Heat Treated
Length 130.59mm
Magna-flux Inspected
Pin End Compatible w/Most Pistons w/o Machining
Shot-Peened For Reduced Fatigue
Weight 535 Grams

Specifications

Product Attributes - Brand: Skunk 2
Product Attributes - Manufacturer's Part Number: 306-12-1000
Product Attributes - Part Type: Connecting Rods
Product Attributes - Product Line: Skunk2 Racing Alpha Series Connecting Rods
Product Attributes - UPC: 873265006786
Product Attributes - Connecting Rod Length Center to Center (in.): 5.141 in.
Product Attributes - Connecting Rod Beam Style: H-beam
Product Attributes - Connecting Rod Material: Chromoly 4340 steel
Product Attributes - Wrist Pin Style: Floating
Product Attributes - Pin End Bore Diameter: 0.905 in.
Product Attributes - Big End Bore Diameter (in.): 2.1660
Product Attributes - Quantity: Sold as a set of 4.
Product Attributes - Cap Retention Style: Cap screw
Product Attributes - Big End Width (in.): 0.843
Product Attributes - Clearanced for Stroker: No
Product Attributes - Connecting Rod Bolt Brand: ARP
Product Attributes - Connecting Rod Bolt Diameter: 3/8 in.
Product Attributes - Connecting Rod Bolt Material: ARP2000 alloy
Product Attributes - Fastener Tensile Strength (psi): 200,000 psi
Product Attributes - Connecting Rod Bolt Head Style: 12-point
Product Attributes - Approximate Connecting Rod Weight (g): 535
Product Attributes - Advertised Horsepower Rating: 900 hp
Product Attributes - Pin End Width (in.): 0.843 in.
Product Attributes - Weight Matched Set: Yes
Product Attributes - Remanufactured: No
Product Attributes - Magnafluxed: Yes
Product Attributes - Connecting Rod Color: Shot-peened

Reference Information

Brand Name/s	Skunk2 Racing
StreetFX SKU	skk306-12-1000
SFX Item ID	4442485
Supplier Item Code	4442485
Manufacturer SKU	306-12-1000
Manufacturer UPC	873265006786
Alternative References	skunk2, SK2-306-12-1000, EJ25