Piston - Small Block Dome - Forged - 4.185 in Bore - 1/16 x 1/16 x 3/16 in Ring Grooves - Plus 10.80 cc - Small Block Chevy - Set of 8

JE Pistons 400SBC .305 DOME Set of 8 Pistons

JE Auto forged pistons from JE Pistons are the result of over 75 years of industry leading experience extended to our range of premium forged pistons for 23 Degree Small Block Chevy Engines JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From drift track to drag strip, JE Pistons’ performance is proven in victory lane time and time again. Equipped with the following custom level features

Additional Information

4.185 in. Bore, 1.062 CD, Flat Top, 10.8 cc, 8 Cyl. Piston Kit

Part Type

Engine Piston Kit

• Accumulator Groove: A specialty groove between the top and second ring provides added volume for blow-by gases. This helps reduce pressure between the rings, improving top ring seal and minimizing ring flutter at high cylinder pressures.
• Contact Reduction: Reduce the amount of contact area against the cylinder wall when the piston "Rocks over". Contact reduction also serves to disrupt the flame travel into the crevice area causing a reduction in detonation.
• Designed specifically for 23 Degree Small Block Chevy Engines To provide optimized performance durability
• Double Pin Oilers: Deliver twice the amount of oil to the wrist pin as compared to the standard single pin oiler.
• Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
• Includes high-quality wrist pins, and locks
• Made 100% in the USA
• Pin Fit: The pin bore is precision honed to attain an exact pin clearance. Clearances typically range from .0003 to .0010 between the wrist pin and pin bore.
• Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
• Smooth Crown Finish: Deburs all areas around the valve pocket and dome area, to reduces stress risers and prevent hot spots.

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Reference Information

Piston, Forged, Dome, 4.185 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring, Chevy, Small Block, Each

JE Pistons 350/400 small block dome top pistons are high-compression pistons that are compatible with most aftermarket 23 degree heads and are ideal for drag race and Circle Track applications. Valve reliefs will accommodate oversized valves and long-duration, tight lobe separation cams. Precision CNC ring grooves are designed for 1/16, 1/16, 3/16 rings. However, these will not fit JE Pistons Pro Topline or Brodix cylinder heads.