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Manufacturer

Part Number

129123905
Sale Price

$2,649.80

1 left at this price

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Usually delivered within 2 days

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Product Details

The Eagle Specialty Products 129123905 Competition Rotating Assembly is engineered specifically for high-performance Chevrolet LS1 racing engines. This complete rotating assembly is precision-balanced and designed to handle the extreme demands of competitive racing applications, including exotic fuels, nitrous oxide systems, and forced-induction setups.

Key Features:

  • Complete competition-grade rotating assembly for Chevy LS1 engines
  • Precision-balanced components for smooth, high-RPM operation
  • Designed to withstand extreme racing conditions and power levels
  • Compatible with nitrous, supercharger, and turbocharger applications
  • Engineered for use with exotic racing fuels including methanol and E85
  • Carefully selected components optimize performance, reliability, and durability
  • Cost-effective solution for serious racing builds

Eagle Competition Rotating Assemblies deliver professional-grade quality without the premium price tag. Each assembly includes forged components that are matched and balanced to exacting tolerances, ensuring your LS1 engine can handle maximum power output with confidence. Whether you're building a naturally aspirated race motor or a boosted street/strip combination, this assembly provides the foundation for reliable, high-horsepower performance.

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Products specifications

Connecting Rod Material

Forged 4340 steel

Crankshaft Material

Forged 4340 steel

Main Bearings Included

Yes

Rod Bearings Included

Yes

Connecting Rod Length

6.125"

Balance Type

Internal

Piston Ring Thickness

1.0mm, 1.0mm, 2.0mm

Crankshaft Flange Bolt Holes

6

Damper Included

No

Thrust Washer Included

No

Piston Ring Gap

file fit

Second Piston Ring Type

Reverse Twist Iron

Flexplate/Flywheel Included

No

Connecting Rod Bolt Material

ARP 8740

Rod Bearing Type

hardened, chamfered or narrowed

Piston Pin Type

Full Floating

Crankshaft Rod Journal Diameter

2.100"

Crankshaft Main Journal Diameter

2.559"

Assembly Balanced

No

Cylinder Bore Diameter

3.905"

Piston Brand

Mahle

Connecting Rod Design

H-Beam

Oil Rail Support Included

Yes

Main Bearing Type

hardened, chamfered or narrowed

Crankshaft Center Counterweights

No

Assembly Type

Competition Assembly

Piston Dome Volume

-6cc

Piston Material

Forged 4032 Aluminum

Crankshaft Reluctor

24 tooth

Piston Face Type

flat top

Piston Pin Diameter

.927"

Connecting Rod Bolt Diameter

7/16"

Top Piston Ring Type

Barrel Faced Plasma-Moly

Crankshaft Stroke

4.000"

It took exactly a week for the part to be shipped because the part came directly from the supplier. But the price was the lowest around.

Bought a new air intake for my Ford Raptor... Got it in the time they said id get it and for a great price too ...had to call a few times to see the status because it came from the manufacturer wasn't really a big issue customer service was very helpful all the times I talked to them very very happy with my new intake and will be glad to reccommend or use autoplicity again

Good price, fast delivery

Best prices I have found. They got me a tracking number within 2 business days. Can't wait for my goods to arrive. Will be using this site again for sure.

I ordered a windshield wiper fluid reservoir. It came on time and was the product I needed. It fit perfectly and works great.

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