KB Hyper Performance Piston Set, KB257.030

KB Hyper Piston - Chevy 454 Rod 6.135 oc Hollow Dome -26cc 1V

Centered pin. OC = open chamber head.

Sold As: Piston Set

Engine Manufacturer: Chevrolet

Engine Family: Chevrolet BB V8 Mark IV

Engine Displacement (Liters): 7.4

Engine Displacement (cubic inches): 454

Bore Size (in): 4.25

Bore Size (mm): 108

Piston Head Type: Dome

Crown (cc): -26cc

Compression Ratio: 119-10.2

Top Land: 0.308

Pin Type: Press or Floating

Stroke (in): 4

Crown Type: .250" OC HOLLOW DOME 1V

Pin Configuration: Centered

Intake Valve Depth/Diameter: .266/2.310

Rod (mm): 155.829

Year From: 1970

Bore Diameter IN: 4.25

OE Deck Height: 9.8

Rod (in): 6.135

Bore Diameter MM: 108

Compression Height IN: 1.645

Compression Height MM: 41.7

Year Range: 1970-2000

Oversizes: STD, .030, .040, .060, .070, .100

Oversize: .030"

Pin Diameter (in): 0.99

Pin Number: 0990x300K

Year To: 2000

Base Number: KB257

Oversized: Yes

Piston Material: Cast 390 Hypereutectic Alloy

Pin Diameter (mm): 25.1

Ring Pack: 5/64, 5/64, 3/16

Alloy: 390

Make for Engine Family: General Motors

Stroke (mm): 101.6

Lock: PRG110-3