Keith Black Pistons KB320-040 Fits SBF 408W Flat Top 6.5cc Bore 4.040

Fits SB Ford 408W, Bore 4.040 Stroke 4.000, Rod Length 6.200, Flat Top 6.5cc, 2 Valve Reliefs, Compression Height 1.280, Set of 8 Pistons

Special Price $466.89 Regular Price $474.00

Piston Options

KB320KTM Ring Set + $105.00

KB320KTD Ring Set + $110.00

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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 12.5:1, 62cc 11.9:1, 64cc 11.6:1, 76cc 10.2:1

Advertised piston weight 463 grams, 107 gram wrist pin

OE Deck Height 9.500"

Note: Standard bore size is 4.000

Note: Centered Pin. Oil spacer ring included. Pre-71 blocks 0.020 shorter, not enough stock to clean up. Made with Ford 351W block

Specifications

More Information
CNC Part Number	UEM-KB320-040
Price	$474.00
Manufacturer's Part Number	KB320-040
Brands	Keith Black
Part Types	Engine Piston
Departments	Parts
Vehicle Make	Ford SB
Bore Size	4.040
Crankshaft Stroke	4.000
Rod Length	6.200
Piston Type	Flat Top
Compression Height	1.280
Piston Material	Hypereutectic
Piston Ring Size	1/16 1/16 3/16
Wrist Pin Size	0.927
Custom Notices	⚠ PROP 65 WARNING