Keith Black Pistons KB139-020 Fits SBC 400 Flat Top 7cc Bore 4.145

Fits SB Chevy 400, Bore 4.145, Stroke 3.750, Rod Length 5.700, Flat Top 7cc, 2 Valve Relief, Compression Height 1.433, Set of 8 Pistons

Special Price $483.01 Regular Price $490.37

Piston Options

KB139KTM Ring Set + $120.00

KB139KTD Ring Set + $125.00

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⚠ PROP 65 WARNING

⚠ WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer. Please contact us to obtain a list of harmful chemicals. For more information, go to www.P65Warnings.ca.gov.

Description

Keith Black Hypereutectic pistons are a great choice for high performance marine, drag race, circle track, street or towing application builds. The low expansion 390 alloy with 16 percent silicon allows for a tighter piston to wall running clearance.

Fully machined head and valve reliefs

Triple Spiral Lock Rings

CNC machined pin bores produce straight and accurately sized bores

Accumulator Groove aids with compression ring seal

Machined in Oil Returns

Diamond Finished Skirts

Mini Grooves to reduce scuffing and overheating

Wrist pins and spiral lock included

1/16 x 1/16 x 3/16 rings not included

Compression Ratio 58cc 12.3:1, 62cc 11.7:1, 64cc 11.4:1, 76cc 10.0:1

Advertised piston weight 587 grams, 145 gram wrist pin

OE Deck Height 9.025"

Note: Standard bore size is 4.125

Note: Centered Pin

Specifications

More Information
CNC Part Number	UEM-KB139-020
Price	$490.37
Manufacturer's Part Number	KB139-020
Brands	Keith Black
Part Types	Engine Piston
Departments	Parts
Vehicle Make	Chevy SB
Bore Size	4.145
Crankshaft Stroke	3.750
Rod Length	5.700
Piston Type	Flat Top
Compression Height	1.433
Piston Material	Hypereutectic
Piston Ring Size	1/16 1/16 3/16
Wrist Pin Size	0.927
Custom Notices	⚠ PROP 65 WARNING