Keith Black Pistons KB397-STD Fits BBC 489 Dome 17cc Bore 4.250

Fits BB Chevy 489, Bore 4.250, Stroke 4.250, Rod Length 6.135 and 6.535, Dome 17cc, 1 Valve Relief, Compression Height 1.520, Set of 8 Pistons

$497.76

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

Advertised piston weight 652 grams, 158 gram wrist pin

OE Deck Height 9.800" and 10.200"

Note: Standard bore size is 4.250

Note: Centered Pin. Closed Chamber Head. Made from Chevy 454 BB tall block

Specifications

More Information
CNC Part Number	UEM-KB397-STD
Price	$497.76
Sold As	Set
Manufacturer's Part Number	KB397-STD
Brands	Keith Black
Part Types	Engine Piston
Departments	Parts
Vehicle Make	Chevy BB
Bore Size	4.250
Crankshaft Stroke	4.250
Rod Length	6.135, 6.535
Piston Type	Dome
Compression Height	1.520
Piston Material	Hypereutectic
Piston Ring Size	1/16 1/16 3/16
Wrist Pin Size	0.990
Custom Notices	⚠ PROP 65 WARNING