Manley 15038R6-4 H-Tuff H-Beam Connecting Rod Set with ARP 625+ Bolts

The R6 designation indicates these rods are equipped with upgraded 3/8" ARP Custom Age 625+ cap fasteners, delivering additional clamping strength and fatigue resistance over the standard ARP 2000 bolts for even higher power applications.

Key Features:

• H-Tuff Series design — incorporates a wider beam and increased cross-sectional thickness in critical areas compared to standard H-Beam rods, bridging the gap between the standard H-Beam and the top-of-the-line Turbo Tuff I-Beam
• Forged from 4340 steel — manufactured to the same exacting standards developed for Manley's original equipment customers
• Heat treated, stress relieved, shot peened, and 100% individually magnafluxed for maximum strength and quality assurance
• Weight matched sets ± 1.5 grams — precision balanced for smooth, high-RPM operation
• Perfectly round big and small ends — honed to a tolerance of ±.0002" for precise bearing fit
• Bend and twist tightly controlled — critical tolerances maintained throughout the manufacturing process
• 3/8" ARP Custom Age 625+ rod bolts included — premium fasteners for elevated boost and extreme horsepower builds
• Approximate flywheel horsepower rating: 750+ HP (4-cylinder application)

Specifications:

• Center-to-Center Length: 5.976"
• Big End Bore: 2.166"
• Pin End Bore (Small End): 0.8868"
• Wrist Pin Diameter: 0.886" (22.5mm)
• Rod Bolt: 3/8" ARP Custom Age 625+
• Rod Style: H-Beam (H-Tuff Series)
• Material: 4340 Forged Steel
• Average Rod Weight: 640 grams each

The Manley H-Tuff Series connects rods deliver a stronger rod with a greater safety margin for forced induction and high-powered builds, making them an ideal upgrade over OEM connecting rods for serious performance street and track applications.