What is the compression ratio with these pistons?

The pistons are a flat-top design with a -4cc dish. The final compression ratio will depend on the combustion chamber volume of the cylinder heads you use, the bore and stroke of the assembly, and your head gasket thickness. You will need to calculate this based on your specific combination.

What are the ARP cap screw specifications?

The connecting rods come standard with 7/16-inch ARP 8740 cap screws. Optional ARP 2000 cap screws are available for applications requiring even greater strength and reliability under extreme stress.

What is included in this rotating assembly kit?

This kit includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods with ARP cap screws, 2618 forged aluminum pistons, premium chrome moly wrist pins, high performance piston rings, and Clevite H Series rod bearings and P Series main bearings.

Specifications

Brand: Manley Performance
Part #: 28415R
UPC: 807298093239

Manley Kit - LS 415 4.070in Bore 4.00in Stroke -4cc Flat Pistons 415ci Rotating Asmbly w/ARP 2000

Name: Manley Kit - LS 415 4.070in Bore 4.00in Stroke -4cc Flat Pistons 415ci Rotating Asmbly w/ARP 2000
Brand: Manley Performance
SKU: manley-performance-manley-kit-ls-415-4-070in-bore-4-00in-stroke-4cc-flat-pistons-t14-556634
Price: 4089.29 USD
Availability: BackOrder

$4089.29

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley Performance LS rotating assembly for Chevy LS engines. 4.070in bore, 4.00in stroke, flat top pistons. Part# 28415R.

Key Features

Fits Chevy LS engines.
4.070 inch bore and 4.00 inch stroke for 415 cubic inch displacement.
Lightweight 4340 forged steel crankshaft.
4340 forged steel H-beam connecting rods with 7/16" ARP 8740 cap screws.
2618 forged aluminum Platinum Series pistons with premium chrome moly wrist pins.
Includes high performance piston rings.

This rotating assembly is designed for Chevy LS engines. Please verify compatibility with your specific engine block and application before purchase.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

This is the Manley Performance LS 415 rotating assembly, built for Chevy LS engines. It features a 4.070-inch bore and a 4.00-inch stroke, creating a 415 cubic inch displacement. This assembly is designed for builders looking to significantly increase the displacement and power potential of their LS engine, whether for street performance, track use, or drag racing.

At the heart of this assembly is a lightweight 4340 forged steel crankshaft, chosen for its strength and ability to handle higher RPMs and increased cylinder pressures. Paired with the crankshaft are 4340 forged steel H-beam connecting rods, which are known for their robust construction. These rods come equipped with 7/16-inch ARP 8740 cap screws, or you can opt for the even stronger ARP 2000 cap screws for applications demanding maximum reliability under extreme stress. The pistons are Manley's 2618 forged aluminum Platinum Series, featuring a flat-top design with a -4cc dish to achieve a specific compression ratio when combined with your cylinder heads. They include premium chrome moly wrist pins for durability. To ensure optimal performance and longevity, the assembly comes with high-performance piston rings and high-performance Clevite H Series rod bearings (narrowed) and P Series main bearings, specifically chosen for their ability to handle the loads in a performance LS engine.

This rotating assembly is a significant upgrade for anyone building a high-performance LS engine. Please note that this assembly is not CARB approved and cannot be shipped to California. It also carries a Prop 65 warning.