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In-Store Pickup Location

Keith Black KB Performance Pistons KB405-024

Pistons, Hypereutectic, Dish, 4.375 in. Bore, Oldsmobile, Set of 8

Estimated Ship Date: Loading...Processing 4/3/2019 (if ordered today) Would you rather pick it up? Select Location

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  • This part is normally shipped directly from the manufacturer / Supplier.

  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

Brand: Keith Black/KB Pistons

Manufacturer's Part Number: KB405-024

Part Type: Pistons

Product Line: Keith Black KB Performance Pistons

Summit Racing Part Number: UEM-KB405-024

UPC: 800745104212

Bore (in): 4.375 in.

Bore (mm): 111.125mm

Piston Style: Dish, with two valve reliefs

Piston Material: Hypereutectic aluminum

Compression Height (in): 1.615 in.

Piston Head Volume (cc): +6.00cc

Wrist Pin Style: Press-fit or floating

Pin Lock Rings Included: No

Wrist Pin Included: Yes

Pin Diameter (in): 0.981 in.

Piston Ring Thickness: 1/16 in. x 1/16 in. x 3/16 in.

Piston Rings Included: No

Quantity: Sold as a set of 8.

Notes: D shaped recess.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

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Tool Stroker Combinations

Keith Black hypereutectic pistons are made from 390 aluminum alloy and heat-treated to T6 standards, which makes them 30 percent stronger than ordinary untreated hypereutectics. Their 100 percent CNC-machined crowns, high upper compression-ring location, gas-accumulator groove, drilled oil returns, and spiral-lock retainer grooves make these pistons outstanding for performance applications. They have a lightweight, rigid-rib skirt design that stabilizes the piston in the bore. All of this adds up to pistons that fit tighter than forged types, provide improved oil control, reduce blowby, increase ring life, eliminate cold start-up knocking, and won't cost you an arm and a leg! Thousands of models are available—find the set and options designed for your vehicle and engine application.


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Some parts are not legal for use in California or other states with similar laws / regulations

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