Keith Black Pistons KB284-040 Fits BBC 489 Flat Top 3cc Bore 4.290

Fits BB Chevy 489, Bore 4.290, Stroke 4.250, Rod Length 6.385, Flat Top 3cc, 1 Valve Relief, Compression Height 1.270, Set of 8 Pistons

Special Price $522.38 Regular Price $530.34

View Similar Items

⚠ 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 96.5cc 10.2:1, 105cc 9.5:1, 108cc 9.3:1, 119cc 8.6:1

Advertised piston weight 556 grams, 158 gram wrist pin

OE Deck Height 9.800"

Note: Standard bore size is 4.250

Note: Centered Pin. Includes Spacer Ring. Made from Chevy BB 454

Specifications

More Information
CNC Part Number	UEM-KB284-040
Price	$530.34
Manufacturer's Part Number	KB284-040
Brands	Keith Black
Part Types	Engine Piston
Departments	Parts
Vehicle Make	Chevy BB
Bore Size	4.290
Crankshaft Stroke	4.250
Rod Length	6.385
Piston Type	Flat Top
Compression Height	1.270
Piston Material	Hypereutectic
Piston Ring Size	1/16 1/16 3/16
Wrist Pin Size	0.990
Custom Notices	⚠ PROP 65 WARNING