Specifications
- Brand
- Eagle
- Part #
- B21206030
- UPC
- 793348039169

Eagle Chrysler RB 4.150in Crank 6.760in H-Beam -29cc 4.350in Pistons Balanced Assembly
$3900.24
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Eagle Chrysler RB balanced rotating assembly. Includes forged crank, H-beam rods, JE pistons, and King bearings for high-performance builds.
Key Features
- Fits Chrysler RB engines.
- Includes a forged 4340 crankshaft with a 4.150-inch stroke.
- Comes with 6.760-inch H-beam connecting rods secured by 7/16-inch ARP 8740 bolts.
- Features forged 2618 JE pistons with a -29cc inverted dome design.
- Includes plasma-moly file-fit piston rings for custom gap setting.
- Equipped with King XP rod and main bearings for reliable performance.
⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more
Product Details
What you get in this balanced rotating assembly is a complete package ready to build a serious performance engine. Inside this box, you'll find a forged 4340 crankshaft with a 4.150-inch stroke, paired with 6.760-inch H-beam connecting rods. These rods are secured with 7/16-inch ARP 8740 bolts, known for their strength and reliability in high-stress applications. The assembly also includes forged 2618 JE pistons, featuring an inverted dome design with a -29cc volume, and they come with plasma-moly file-fit rings, allowing for precise gap setting. Finally, King XP rod and main bearings are included to ensure smooth rotation and proper oil clearance.
This rotating assembly is built for demanding use, including racing applications that might involve nitrous oxide or forced induction. The forged 4340 crank and H-beam rods are strong enough to handle significant power increases. The JE pistons are forged from 2618 aluminum, a material chosen for its durability and ability to withstand high temperatures and pressures. The plasma-moly rings are designed for performance, offering good sealing and wear characteristics when properly gapped for your specific application. The inclusion of King XP bearings means you're getting well-regarded bearings that offer excellent performance and durability.
When assembling this into your Chrysler RB engine, pay close attention to the ring gapping as the plasma-moly rings are file-fit. This allows for a custom fit to your cylinder bores, which is crucial for optimal performance and sealing. This assembly is intended for high-performance builds and is not CARB approved, meaning it cannot be shipped to California. Ensure you have the necessary machine work done on your block to accept these components, as this is a performance rotating assembly that requires precision fitting.
Specifications
- Brand
- Eagle
- Manufacturer Part #
- B21206030
- UPC
- 793348039169
Frequently Asked Questions
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