BTRROD6125H1-8 Forged 4340 H-Beam Connecting Rod Set for GM Gen III/IV LS Engines 6.125 in. Length [Set of 8]
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BRIAN TOOLEY RACING BTRPART NUMBER: 559-J000006

BTRROD6125H1-8 Forged 4340 H-Beam Connecting Rod Set for GM Gen III/IV LS Engines 6.125 in. Length [Set of 8]

$75999
ShippingShips on 09/16/2026
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GM Gen III/IV LS
    H-Beam Connecting Rod Set
  • GM Gen III/IV LS Engines
  • 6.125 in. Length
  • .927 in. Pin Bore
  • 2.100 in. Rod Journal
  • 4340 Forged Steel
  • ARP 2000 Bolts
  • Bronze Bushings
  • Shot Peened
  • Set of 8

    BTR’s 4340 forged H-beam connecting rods are engineered for high strength, dimensional accuracy, and long-term durability in demanding LS engine builds. Each rod is heat-treated, stress relieved, and shot peened to enhance fatigue resistance. The 6.125 in. center-to-center length mates with a 2.100 in. rod journal and a bronze-bushed .9278 in. pin bore, making these rods suitable for a wide range of LS stroker and rebuild applications. Precision machining and serialized cap-and-rod pairing ensure proper alignment and repeatable bearing clearances after service. Every set undergoes inspection for housing bore diameter, pin bore diameter, bend, twist, and center-to-center length. ARP 2000 7/16-20 x 1.600 in. rod bolts are pre-torqued using high-pressure lubricant for consistent clamp load. Rods weigh approximately 665 grams and are matched within 2 grams per set. Each rod is laser marked with the BTR logo, individually VCI bagged, and boxed in matched sets of eight.

Part TypeConnecting Rod
BrandBRIAN TOOLEY RACING BTR
Package Height4.1
Package Width9.4
Package Length11.8
Weight12.73 PG
Part CategoryPerformance Parts
Connecting Rod Bolt BrandARP
Rod Journal Diameter2.100 in.
Connecting Rod Material4340 Forged Steel
Connecting Rod Bolt Head Style12-Point
Connecting Rod Bolt MaterialARP 2000 Alloy
Wrist Pin StyleFull Floating
QuantitySet of 8
Connecting Rod Beam StyleH-Beam
Engine Make/SizeGM Gen III/IV LS
Connecting Rod Length Center To Center6.125 in.
Weight Matched SetYes
Cap Retention StyleCap Screw
Pin End Bore Diameter0.9278 in.
Part FitmentDirect Fit
Vendor Part NumberBTRROD6125H1-8
Package Qty1
Package TypeEA
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