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Wiseco 6243AS 2618 Alloy Forged Piston Open Chamber Dome Big Block Chevy 4.500 in. Bore

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

6243AS
6 reviews
Sale Price

$171.99

Estimated ship date Tuesday, November 17

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Product Details

The Wiseco 6243AS is a Professional Series forged piston engineered for high-performance Chevy Big Block applications. Forged from 2618 aluminum alloy, this individual replacement piston delivers the strength and thermal resilience demanded by serious race and performance engine builders. Designed for a 4.500 in. bore with an open chamber dome profile and a 9.750 in. deck height, this is a purpose-built drag racing piston that delivers a lightweight, race-optimized package.

Key Specifications:

  • Bore: 4.500 in. (114.300 mm)
  • Material: 2618 aluminum alloy forging
  • Dome Style: Open Chamber Dome (502 Dome)
  • Deck Height: 9.750 in.
  • Skirt Design: Full round skirt
  • Ring Grooves: 1/16 in., 1/16 in., 3/16 in.
  • Application: Chevy Big Block — lightweight drag racing
  • Wrist Pin Included: Yes — Pin S460
  • Rings: Sold separately — recommended ring set W100F8-4500-5
  • Groove lock spacer included

ArmorGlide Skirt Coating: This piston features Wiseco's proprietary ArmorGlide skirt coating, a high-tech dry-film lubricant that reduces operating friction, allows tighter bore fitment for improved ring seal, and minimizes piston rock noise — all while extending the wear life of both the piston and cylinder wall.

Professional Series Design Features:

  • Valve pocket geometry engineered to maximize airflow around the valve head, and accommodate oversized valves and high-lift camshafts
  • Crown profile designed to promote intake charge efficiency via cross-flow scavenging during intake/exhaust valve overlap
  • Dome optimized for quench during the compression/combustion cycle, reducing susceptibility to detonation and pre-ignition
  • Precision CNC-machined ring grooves with calculated groove root diameters and axial widths for maximum ring seal, reduced blow-by, and minimized oil consumption
  • Complex skirt profiles that reduce friction-robbing contact while maintaining bore stability for consistent ring seal
  • Chrome moly steel wrist pin for maximum strength and durability
  • ISO-certified forging facility using advanced grain-flow aligned forging technology

This is a single/individual piston. Rings are sold separately — see recommended ring set W100F8-4500-5. Wrist pin S460 is included.

Products specifications

Bore (in)

4.500 in.

Bore (mm)

114.300mm

Comp Ratio @ 110cc

15:1

Comp Ratio @ 114CC

14.2:1

Comp Ratio @ 119CC

13.5:1

Comp Ratio @ 123CC

13:1

Compression Distance (in)

1.120 in.

Dome Height (in)

0.453 in.

Dome Volume

42.4 Hollow

Gram Weight

571

Notes

Supplied with groove lock spacer.

Pin Diameter (in)

0.990 in.

Piston Head Volume (cc)

-42.40cc

Piston Material

Forged aluminum

Piston Ring Thickness

1/16 in. x 1/16 in. x 3/16 in.

Piston Style

Dome, with single valve relief

Quantity

Sold individually.

Rod

6.535 / 6.480 / 6.800 / 6.700

Stroke

4.250 / 4.375 / 4.500 / 4.750

Wrist Pin Style

Press-fit or floating

Found the parts I needed for my vehicle's TPMS system that I could not get anywhere else. They were a better price than any of the other online stores and got my order shipped out in a timely fashion.

Good products at a good price!<br>Never bought from them before, so I used Google Checkout, I always get nervous about buying from a new online store, but they came through just fine.<br>Shipping was a little expensive for the product I purchased and the shipping time, but was still cheaper than most anywhere else.<br>$12 to ship an automotive gauge [>2 lbs] and it was a 5 day ship.<br>Otherwise, a very good experience, B+ to A- just because of shipping cost/time.

Very easy site to use plus the added bonus of the free buySafe guarantee.

Great prices and fast shipping! What more could you ask for?

Great prices, fast shipping.

Good service, fast shipping, excellent prices

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