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KB Claimer Chevy 377/400 Hypereutectic Pistons, Flat Top, 5.7/5.565 Rod

Price:$279.99
Item #:
4749907
Item Details:
(377) C/R 64cc=10.9, 76cc=9.6
(400) C/R 58cc=12.6, 64cc=11.7, 76cc=10.3
Piston/Pin Weight: 630 g
Rod Length: 5.7(377), 5.565(400)
KB Claimer Chevy 377/400 Hypereutectic Pistons, Flat Top, 5.7/5.565 Rod
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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 (lockrings included).

Set of 8 for Chevy 377 c.i. (4.125" bore x 3.48" stroke x 5.7" rod) and Chevy 400 c.i. (4.125" bore x 3.75" stroke x 5.565"). Does not include piston ring set. Use 5/64", 5/64", 3/16" piston rings (Ring Style A).

KB Claimer Piston Chart (GIF)

Ring Style Chart (GIF)

  • Comp Height 5.565" Rod -  1.565
  • Comp Height 5.7" Rod -  1.433
  • Pin Diameter -  0.9272
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    Keith Black Hyperutectic pistons are favored for their improved power and reduced scuffing. The unique design & manufacturing processes combine to produce a rigid piston, which will rock less in the bore improving ring seal. These T-5 heat treated pistons also offer reduced thermal expansion, which allows you to run tighter clearances and allows the piston rings to seal better and minimize blow-by. 
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    474-182 Instructions (PDF)