Keith Black Pistons KB150-040 Fits BBF 390 FE Dish 20cc Bore 4.090

Fits BB Ford 390 FE, Bore 4.090 Stroke 3.780, Rod Length 6.490, Dish 20cc, 2 Valve Reliefs, Compression Height 1.780, Set of 8 Pistons

$527.04

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⚠ 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

5/64 x 3/32 x 3/16 rings not included

Compression Ratio 60cc 10.1:1, 68cc 9.4:1, 73cc 9.0:1, 88cc 8.0:1

Advertised piston weight 536 grams, 143 gram wrist pin

OE Deck Height 10.170"

Note: Standard bore size is 4.050

Note: Centered Pin

Specifications

More Information
Price	$527.04
Vehicle Make	Ford BB
Bore Size	4.090
Crankshaft Stroke	3.780
Rod Length	6.490
Piston Type	Dish
Compression Height	1.780
Piston Material	Hypereutectic
Piston Ring Size	5/64 3/32 3/16
Wrist Pin Size	0.975
Custom Notices	⚠ PROP 65 WARNING