What is the compression ratio impact of the -5.0cc piston dish?

The -5.0cc dish on these flat-top pistons will lower the compression ratio compared to a flat-top piston with zero dish. The exact impact depends on your cylinder head volume and head gasket thickness. This dish is common for naturally aspirated builds aiming for a specific compression target or for forced induction applications.

What are the benefits of the Forged Side Relief (FSR) design?

The FSR design uses reduced skirt width and a shorter wrist pin. This combination helps to minimize friction and power loss, while also saving weight. It's a key feature for high-performance engines where efficiency and reduced internal drag are important.

Are these pistons suitable for a street-driven car?

While forged pistons are built for high performance, the skirt coating and accumulator groove (if included in your specific application) can help reduce friction and noise, making them more suitable for street use than some other racing pistons. However, they are primarily designed for high-demand performance applications.

JE Pistons 302/351 SBF HDFT -5c Set of 8 Pistons 170855

Name: JE Pistons 302/351 SBF HDFT -5c Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-302-351-sbf-hdft-5c-set-of-8-pistons-t14-295210
Price: 1052.79 USD
Availability: BackOrder

JE Pistons 302/351 SBF HDFT -5c Set of 8 Pistons

$1052.79

On Backorder

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

JE Pistons 302/351 SBF HDFT -5c Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits 302/351 Windsor small-block Ford engines.
Set includes 8 pistons, wrist pins, and locks.
Designed for a 4.030 inch bore with a -5.0cc flat top dish.
Forged in the USA from 2618 aluminum for high tensile strength.
Features a proprietary Forged Side Relief (FSR) design to minimize friction and weight.
May include an accumulator groove to improve ring seal and reduce flutter.

This piston set is designed for 302 and 351 Windsor small-block Ford engines with a 4.030 inch bore. Not CARB approved.

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Product Details

If you're rebuilding a high-performance 302 or 351 Windsor small-block Ford engine, a solid set of pistons is crucial for handling the increased stress and power. These JE Pistons are built for just that, offering a robust foundation for your performance build. They are designed to work with a 4.030-inch bore and feature a -5.0cc flat top dish, which is important for achieving your desired compression ratio with your specific cylinder heads and camshaft.

JE Pistons uses a proprietary Forged Side Relief (FSR) forging design, which helps minimize friction and power loss by using a reduced skirt width. This design, combined with a shorter wrist pin, also saves weight. The pistons are forged in the USA from 2618 aluminum, a material known for its high tensile strength, making it well-suited for demanding performance applications. Depending on the specific application, these pistons may also feature an accumulator groove to reduce combustion gas pressure, which helps prevent ring flutter and improves ring seal for consistent power delivery. Some applications also include a skirt coating to further reduce friction and wear on the piston skirts and cylinder walls, which can also lead to quieter operation.

This set includes eight pistons, the wrist pins, and locks, providing a complete kit for your V8 engine. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly details.