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#474125
KB Chevy 400 Hypereutectic Pistons, Flat Top, 5.7 Rod
- 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
$450.07
/set
In Stock
$555.64
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Product Summary
Flat Top w/ 2 valve reliefs Piston Style, 3.750" Stroke
- 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
Key Specs
| MFG. Part # | Select Oversize |
| Piston Style | Flat Top w/ 2 valve reliefs |
| Piston Material | Hypereutectic Aluminum |
| Wrist Pin Included | Yes |
| Wrist Pin Style | Press-Fit or Floating |
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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 Details
C/R 58cc=12.3, 64cc=11.4, 76cc=10.0Piston/Pin Weight: 564 g
Rod Length: 5.7", Ring Style: A
Charts
474-125 Instructions (PDF)
Ring Style Chart (GIF)
Specs
- Comp Height - 1.433
CARB Warning
For race/ off road use only
CARB Warning
For race/ off road use only
Specifications
Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | Select Oversize to see |
| Brand | Keith Black |
| Piston Style | Flat Top w/ 2 valve reliefs |
| Piston Material | Hypereutectic Aluminum |
| Wrist Pin Included | Yes |
| Wrist Pin Style | Press-Fit or Floating |
| GENERAL | |
| Piston Diameter | Select Oversize to see |
| Stroke | 3.750" |
| Connecting Rod Length | 5.700" |
| Piston Weight | 564 grams |
| Piston Ring Style | A |
| 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 |
| GTIN Code | Select Oversize to see |
| Sold in Quantity | Set |
Ratings & Reviews
Ratings & Reviews
Questions & Answers
Questions & Answers
2 Questions • 2 Answers
Will these pistons fit 6 inch rods
by Devin Lenoir
• 2 years ago
1 answer
View Answer
What are the cc's of the two Valve notches on this piston ??
by You don't want to know.
• 3 years ago
1 answer
View Answer
2 of 2 questions shown
