Keith Black Pistons KB255-STD Fits SBF 372W Dome 1cc Bore 4.000

Fits SB Ford 372W, Bore 4.000 Stroke 3.640, Rod Length 6.200, Dome 1cc, 2 Valve Reliefs, Compression Height 1.440, Set of 8 Pistons

$492.56

Piston Options

KB255KTM Ring Set + $105.00

KB255KTD 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.

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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 55cc 13.2:1, 60cc 12.3:1, 64cc 11.7:1, 69cc 11.0:1

Advertised piston weight 513 grams, 145 gram wrist pin

OE Deck Height 9.500"

Note: Standard bore size is 4.000

Note: 0.150" Solid Dome. Centered Pin. Windsor crank offset ground to 3.640, 6.2 rod .9272 pin. Pre-71 blocks 0.020 shorter, not enough stock to clean up

Specifications

More Information
Price	$492.56
Vehicle Make	Ford SB
Bore Size	4.000
Crankshaft Stroke	3.640
Rod Length	6.200
Piston Type	Dome
Compression Height	1.440
Piston Material	Hypereutectic
Piston Ring Size	1/16 1/16 3/16
Wrist Pin Size	0.927
Custom Notices	⚠ PROP 65 WARNING