Manley 15038-1 H-Tuff H-Beam Connecting Rod Mazda Speed 2.5L

The Manley 15038-1 is a high-performance H-Tuff H-Beam connecting rod designed specifically for Mazda Speed SMZR 2.5L engines. This single connecting rod features a 5.9-inch center-to-center length and represents Manley's enhanced design that bridges the gap between standard H-Beam and Pro Series I-Beam connecting rods.

Construction and Quality:

• Forged from premium 4340 steel alloy for exceptional strength and durability
• Fully machined, heat treated, stress relieved, and shot peened to exacting standards
• 100% magnafluxed for quality assurance
• Weight matched to ±1.5 grams when purchased as a set
• Big and small end bores honed to ±0.0002" tolerance

H-Tuff Design Features:

• Increased cross-sectional thickness in critical areas for superior strength
• Double-ribbed pin surround for enhanced pin support
• Wider beam design compared to standard H-Beam rods
• Perfectly round big and small ends with tightly controlled bend and twist
• Equipped with premium 3/8" ARP 2000 bolts for secure fastening

The H-Tuff design is specifically engineered to handle higher boost and horsepower levels than standard H-Beam connecting rods, making it ideal for turbocharged applications. Manley connecting rods are manufactured to the same exacting standards developed and approved by original equipment manufacturers, ensuring professional-grade quality and reliability for high-performance builds.