Keith Black Hypereutectic pistons are T-6 heat treated and offer reduced scuffing and improved durability over stock replacement pistons. They also allow you to run tighter clearances because of reduced thermal expansion, which means more race winning power.

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
2.120" Intake and 1.880" Exhaust valve relief sizes

For Ford 302 c.i. (4.00" bore x 3.00" stroke). Use piston ring Style A (5/64", 5/64", 3/16").

Item Details

C/R 64cc: 10.0, C/R 69cc: 9.4
Bore and Stroke: 4.00" x 3.00"
Rod Length: 5.09" Ring Style: A

Charts

474-116 Instructions (PDF)

Ring Style Chart (GIF)

Specs

Pin Diameter: .912"

Guides & Documents

Pistons Installation Instructions (474116)

Pistons Technical Information (474116)

CARB Warning

For race/ off road use only

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. 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.

CA Prop 65

CARB warning

Specifications

KEY SPECS
MFG. Part #	Select Oversize to see
Brand	Keith Black
Piston Style	Dome
Piston Material	Hypereutectic Aluminum
Wrist Pin Included	Yes
Wrist Pin Style	Press-Fit or Floating

GENERAL
Piston Diameter	Select Oversize to see
Dome Height	Select Oversize to see
Stroke	3.000"
Connecting Rod Length	5.090"
Piston Weight	600 grams
Piston Ring Style	A
Wrist Pin Diameter	0.9120"
Wrist Pin Weight	143 grams
Top Ring Thickness	5/64"
Second Ring Thickness	5/64"
Oil Ring Thickness	3/16"
GTIN Code	Select Oversize to see
Sold in Quantity	Set

Ratings & Reviews

3 Reviews

Overall Assessment

Customers commend the product for its superior quality and affordability. Particularly, they are impressed with the pistons' excellent performance. The remarkable quality of the material used is appreciated, adding value and practicality. Users also preferred our product over competitors due to its cost-effectiveness. Many expressed their intent to purchase again, demonstrating satisfaction and trust in the product.

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3 reviews

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Beautiful workmanship and great product.m

5.0

a year ago

Mickey

Grants Pass Oregon

Verified

Most definitely use again. Very good customer service.

Would Recommend

Great pistons for the price!!

5.0

6 years ago

Chris

Denver co

Verified

Great pistons for the cost and free shipping.

great pistons fast shipping would buy again on my next build

5.0

10 years ago

dale agard

Queensbury ny

Verified

Great product good price

Would Recommend

Showing 3 of 3 reviews