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Manley Pro Series Steel Rods - I-Beam - Forced Induction - 300M Steel - 6.657 Length - ARP 2000 Cap Screws - .866 Floating Pin - Ford 5.4L
Manley Steel Rods

Photo may not be actual product

Price $2,530.00

Product Code: MAN-15321-8


Manley Pro Series 4340 Forged Steel Rods The Manley Pro Series I-Beam rod has become the benchmark for fully machined billet style high end connecting rods in the performance industry. Multiple weight designs targeting specific markets combined with their finely tuned manufacturing processes renders a truly outstanding product. Whether it is their 300M alloy "Dirt Series" rod in a 900 HP DLM engine, a 4340 heavy beam design in a twin turbo LS, or their "Turbo Tuff" design in a 1,000 HP EVO. Manley has the correct connecting rod for you.


  • Forged of aircraft quality 300M steel
  • Fully machined to provide the lightest and strongest rod possible
  • Each rod is shot peened to MIL Spec and holistically magnafluxed
  • ARP 2000 cap screws (ARP Custom Age 625+ are optional)
  • Bronze Bushed, with premium AMPCO bushings
  • Horsepower rated at 750 to 1,500 FWHP depending on application

Technical Specifications:

Item Code MAN-15321-8
Vendor Manley Performance
Product Type Connecting Rod
Engine Family FORD - 5.4L
Material 4340 Forged Steel
Connecting Rod Style Pro Series I-Beam
Series Forced Induction
Connecting Rod Length 6.657
Beam Offset .000
Crank Pin Diameter 2.086
Big End Bore Diameter 2.239
Big End Width .940
Wrist Pin Diameter .866
Pin Bore Diameter .8671
Pin End Width .940
Wrist Pin Floating
Cap Retention Cap Screw
Rod Bolt ARP 2000
Rod Bolt Diameter/Length 7/16 x 1.450
Torque Specification 80 ft lbs (w/Moly lube)
Rod Bolt Stretch .0050 - .0060
Approximate Rod Weight 605
Weight Matched Set Yes
Balanced Yes
Quantity Sold as a set of 8

Replacement Parts:

Cap Dowel 42392-16
Wrist Pin Bushing 42302-8
Rod Bolt 42390-4
Moly Lube 40172

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