KB Hyper Performance Piston Kit, KB304KTM.040

1 Set KB304.040/1 Set 4120AM8.040

Centered pin. Designed for use with 14 degree heads. 1967 and later. Piston is.025 below factory deck. Check small end of rod to piston before assembly /.045" clearance per side minimum.

Sold As: Kit with Rings

Engine Manufacturer: Pontiac

Engine Family: Pontiac V8

Engine Displacement (Liters): 7

Engine Displacement (cubic inches): 428

Bore Size (in): 4.12

Bore Size (mm): 104.6

Crown (cc): +6cc

Compression Ratio: 71-11.3, 87-9.7, 96-9.0, 111-8.0

Top Land: 0.275

Pin Type: Press or Floating

Pin Configuration: Centered

Compression Height MM: 40.3

Oversized: Yes

Rod (in): 6.63

Intake Valve Depth/Diameter: .250/2.210

Oversize: .040"

Pin Diameter (mm): 24.9

Oversizes: .030, .040, .060

Rod (mm): 168.402

Bore Diameter MM: 104.6

Bore Diameter IN: 4.12

Compression Height IN: 1.585

Stroke (in): 4

Crown Type: FLAT TOP 2V

Lock: PRH107-3

Year From: 1966

Piston Material: Cast 390 Hypereutectic Alloy

Exhaust Valve Depth/Diameter: .250/2.210

Pin Diameter (in): 0.98

Grade Type: Performance

Base Number: KB304

Year To: 1969

Alloy: 390

Make for Engine Family: General Motors

Pin Number: 0980x300K

Stroke (mm): 101.6

OE Deck Height: 10.25

Year Range: 1966-1969

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