Features fully machined crowns and valve reliefs, Has drilled oil drain backs and full floating wrist pins, Use of reflective alloy allows 2% power increase, Special quench dome technology minimizes deterioration, Manufactured from 390 hypereutectic aluminum alloy Keith Black KB125.030 Chevy 400 Hyperutectic Flat Top Pistons .030 Sku # 474125-030 Mfr. Part # KB125.030 Condition New Brand Keith Black Sold Set Details
Keith Black Hypereutectic 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.
- 390 Hypereutectic alloy
- Fully machined crowns and valve reliefs
- Drilled oil drain backs
- Full floating wrist pins
- Triple wound spiral locks
- Reflective alloy allows 2% power increase
- Quench dome technology minimizes deterioration
- Zero deck quench designs
- Lightweight wrist pins
For Chevy 400 c.i. (4.125" bore x 3.75" stroke).
Item DetailsC/R 58cc=12.3, 64cc=11.4, 76cc=10.0
Piston/Pin Weight: 564 g
Rod Length: 5.7", Ring Style: A Specs Piston Style Flat Top w/ 2 valve reliefs Piston Material Hypereutectic Aluminum Piston Diameter 4.150" Stroke 3.750" Connecting Rod Length 5.700" Piston Weight 564 grams Piston Ring Style A Wrist Pin Included Yes Wrist Pin Style Press-Fit or Floating Wrist Pin Diameter 0.9272" Wrist Pin Weight 145 grams Top Ring Thickness 5/64" Second Ring Thickness 5/64" Oil Ring Thickness 3/16" Compression 58cc = 12.3 : 1 Compression 64cc = 11.4 : 1 Compression 76cc = 10.0 : 1 MFG. Part # KB125.030 GTIN Code 800745044648 Sold in Quantity Set Related Items / Suggested Parts 4.125 Bore Gas Proven A Piston Rings .030 Over Bore, Small Block Chevy Speedway Gas Proven Series Piston Rings, 4.125 Bore, Styles A, B, C Tech Support We're here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through Messaging and a knowledgeable Speedway Motors team member will be happy to help. About Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
