Keith Black Pistons KB398-070 Fits BBC 489 Dome 17cc Bore 4.320

Fits BB Chevy 489, Bore 4.320, Stroke 4.250, Rod Length 6.385, Dome 17cc, 1 Valve Relief, Compression Height 1.270, Set of 8 Pistons

$541.89

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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 96.5cc 12.3:1, 105cc 11.3:1, 108cc 11.0:1, 119cc 10.0:1

Advertised piston weight 608 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. Closed Chamber Head

Specifications

More Information
CNC Part Number	UEM-KB398-070
Price	$541.89
Manufacturer's Part Number	KB398-070
Brands	Keith Black
Part Types	Engine Piston
Departments	Parts
Vehicle Make	Chevy BB
Bore Size	4.320
Crankshaft Stroke	4.250
Rod Length	6.385
Piston Type	Dome
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