Engines and Components› Pistons and Piston Rings

Eagle Specialty Products

Street Performance Rotating Assembly 4.030" Bore / 3.480" Stroke

$1,205.97

SKU: EAGB15402E030

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In Stock
Ships by Sep 9
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$100 Minimum Order
30 Days Return
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Overview

The Eagle Specialty Products EAGB15402E030 is a balanced street performance rotating assembly designed for Chev SB engines with a 2-piece rear seal. This kit features a cast steel crankshaft, cast aluminum pistons with a flat top/ -7cc dome volume, and 5.700" Eagle SIR 5140 steel I-beam connecting rods with press-fit pins. It also includes Moly (Pre-Gapped) rings, King rod bearings, and King main bearings.

This assembly offers the perfect balance of performance, reliability, and affordability. It has a bore of 4.030" and a stroke of 3.480", resulting in an actual cubic inch displacement of 355. The compression ratio varies depending on the cylinder head volume: 10.5:1 with 58cc heads, 9.8:1 with 64cc heads, and 8.7:1 with 76cc heads.
Show original supplier description
The Eagle Specialty Products EAGB15402E030 is a balanced street performance rotating assembly kit engineered for Chevrolet Small Block engines utilizing a 2-piece rear main seal. This comprehensive kit aims to deliver a perfect balance of performance, reliability, and affordability for street applications. The assembly includes a cast steel crankshaft, cast aluminum pistons with a flat top and -7cc dome volume, and 5.700" Eagle SIR 5140 steel I-beam connecting rods that utilize a press-pin design. It also comes complete with Moly (pre-gapped) piston rings, King rod bearings, and King main bearings, all internally balanced for smooth operation. This rotating assembly is built with a 4.030" bore and a 3.480" stroke, yielding a total displacement of 355 cubic inches. The piston design allows for varying compression ratios depending on the cylinder head combustion chamber volume: 10.5:1 with 58cc heads, 9.8:1 with 64cc heads, and 8.7:1 with 76cc heads. This makes it a versatile option for builders aiming for specific compression targets. The kit is suitable for applications up to 500 horsepower. Note that this assembly is internally balanced, meaning a neutral flexplate and harmonic balancer must be purchased separately. While it includes pistons, rings, pins, connecting rods, and bearings, it does not include a harmonic balancer, flexplate, flywheel, camshaft, lifters, oil pump, or gaskets.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandEagle Specialty Products
Part NumberEAGB15402E030
CategoryEngines and Components

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