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Product Summary

Flat Top w/ 2 valve reliefs Piston Style, 3.750" Stroke

  • Pistons feature a T-5 hypereutectic aluminum construction
  • They have flat style top w/ 2 valve reliefs
  • Available in 030, 040, and 060 oversize to custom fit your needs
  • Set is designed for the Chevy 400 c.i. (4.125" bore x 3.75" stroke)
  • Can be used with either press fit or floating wrist pins
See more details

Key Specs

MFG. Part #
Piston StyleFlat Top w/ 2 valve reliefs
Piston MaterialHypereutectic Aluminum
Wrist Pin IncludedYes
Wrist Pin StylePress-Fit or Floating
See more specs

Need To Know

Quick and Easy Returns

Return Policy

Details

These Keith Black Claimer pistons (also known as economy pistons) feature coated skirts, wrist pin lockrings and T-5 hypereutectic construction. Can be used with either press fit or floating wrist pins (wrist pins and lockrings included).

Set of 8 for Chevy 400 c.i. (4.125" bore x 3.75" stroke). Does not include piston ring set. Use 5/64", 5/64", 3/16" piston rings (Ring Style A).

Item Details

C/R 58cc=12.6, 64cc=11.7, 76cc=10.3
Piston/Pin Weight: 624 g
Rod Length: 5.7"

Charts

Specs

  • Comp Height 5.565" Rod -  1.565
  • Comp Height 5.7" Rod -  1.433
  • Pin Diameter -  0.9272

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
MFG. Part #
BrandKeith Black
Piston StyleFlat Top w/ 2 valve reliefs
Piston MaterialHypereutectic Aluminum
Wrist Pin IncludedYes
Wrist Pin StylePress-Fit or Floating
GENERAL
Piston Diameter
Stroke3.750"
Connecting Rod Length5.700"
Piston Weight624 grams
Piston Ring StyleA
Wrist Pin Diameter0.9272"
Top Ring Thickness5/64"
Second Ring Thickness5/64"
Oil Ring Thickness3/16"
Compression 58cc =12.6 : 1
Compression 64cc =11.7 : 1
Compression 76cc =10.3 : 1
GTIN Code
Sold in QuantitySet

Ratings & Reviews

5

6 Reviews

Overall Assessment

Customers highly recommend the product for its quality and affordability. Praised for its excellent craftsmanship, the pistons have been proven to effectively serve user applications. Several reviews emphasize the product's superb performance, highlighting durability and the ability to achieve high compression ratios, exceeding user expectations. The product's supremacy is affirmed by comparisons favoring it over competitors, with many users intending to repurchase. It is noted to be an unbeatable deal, combining quality and value.

5

6 reviews

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Great product for the price

5.0

3 years ago

DRH

Arlington Texas 76016

Verified

Fast shipping

Would Recommend

Very good product!

5.0

8 years ago

Junior33

Susanville, Ca

Verified

Very well made for the price. Worked well for my application.

Would Recommend

Excellent pistons fir the money ☆☆☆☆☆

5.0

9 years ago

Kenny

Spencer Va

Verified

Very good quality of pistons. KB and Speedway Motors.. Winner both ways

Would Recommend

kb claimer pistons gets the job done

5.0

9 years ago

street freak

maynardville tn

Verified

i got 12.0 compression on the kb flat top pistons carries the frount wheels 20 feet.cant beat speedway.SPEEDWAY IS THE WAY TO GO GO GO.

Would Recommend

Excellent product

5.0

10 years ago

Sinister Chevelle

OKC OK

Verified

I used these in a SBC 400 .030 over, after completion engine makes right under 450HP and right at 12:1 ratio, these pistons have held up great and went beyond all expectations, would highly recommend and will purchase another set in the future for sure.

Would Recommend

Great pistons

5.0

14 years ago

rangerfan937

Uhrichsville Ohio

Verified

Perfect. Nice piece all the way around Price that cant be beat

Would Recommend

Showing 6 of 6 reviews

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