BoostLine 5.137in Connecting Rod Set for Subaru EJ20/EJ25 Turbo, ARP 625+ - SB5137-905+

BoostLine SB5137-905+ is a set of 4 connecting rods for Subaru EJ20/EJ25 Turbo applications. Manufacturer data specifies a 5.137 in center-to-center length, 0.9055 in wrist pin diameter, 52 mm crank journal diameter. This configuration uses ARP 625+ rod bolts in a 3/8 x 1.500 size. BoostLine standard-series rods use forged 4340 steel and the brand’s patented three-pocket design for demanding performance engine combinations. Listed weight with bolts is 602 g.

Key Features & Specs:

• Brand: BoostLine
• Series: BoostLine
• Product Type: Connecting Rod Set
• Engine Application: Subaru EJ20/EJ25 Turbo
• Quantity: 4
• Material: Forged 4340 steel
• Center-to-Center Length: 5.137 in
• Wrist Pin Diameter: 0.9055 in
• Crank Journal Diameter: 52 mm
• Big End Bore: 2.1658 in
• Big End Width: 0.8421 in
• Small End Width: 0.8421 in
• Rod Bolt Material: ARP 625+
• Rod Bolt Size: 3/8 x 1.500
• Rod Bolt Part Number: BT61501-625
• Weight With Bolts: 602 g
• Manufacturer Part Number: SB5137-905+
• UPC: 00193564024312

Fitment:

• Subaru EJ20/EJ25 Turbo engine applications

Series Description: BoostLine connecting rods are forged from 4340 steel and use the brand’s patented three-pocket beam design, developed to support high cylinder-pressure performance applications while controlling rotating mass. The standard BoostLine series is positioned for demanding forced-induction, nitrous, street-performance, and racing combinations. Application-specific ARP fasteners and dimensional CMM inspection are part of the product program; exact dimensions and bolt grade vary by part number.