K1 Technologies H-Beam Connecting Rods | 2004-2012 Subaru WRX STI (039DD21131)

K1 Technologies

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Email - sales@maperformance.com

Phone 1-888-627-3736

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$445.91 $473.34Instant Savings of 6% ($27.43)

Earn  $8.92 In MAP Rewards!

2004-2012 Subaru WRX STI H-Beam Connecting Rods by K1 Technologies

K1 Technologies connecting rods offer world-class performance at an affordable price. Our race-ready connecting rods are made from 4340 forged steel, use premium bushing material and are hand finished in the USA. K1’s Engineering Team has decades of experience designing components for professional racing engines and designs each rod for demanding race applications. Don’t trust your engine to anything but K1 Rods!


  • 4340 Forged Steel* - Strength, toughness and resistance to impact
  • Proprietary ARP Bolts* - Asymmetrical threads
  • Pin oiling* - Extra lubrication to minimize pin wear
  • Heavy Radii* - Minimizes clearance without focusing stress in tight radii
  • Thicker Blades* - Minimizes outward bowing at peak combustion pressure
  • Rod Offset* - Center small end to bore center optimizes horsepower
  • +/ -.000050 (50 millionths) tolerance on big end housing bore** - Longer bearing life
  • High tolerance center to center length (< .001”)* - Increased horsepower and efficiency


  • 2004-2012 Subaru WRX STI

What's In The Box?

  • 4 - Connectings Rods


  • K1's Standard Limited Warranty

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