KB Hyper Performance Piston Kit, KB304KTM.030

1 Set KB304.030/1 Set 4120AM8.030

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

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

Compression Height IN: 1.585

Piston Material: Cast 390 Hypereutectic Alloy

Lock: PRH107-3

Exhaust Valve Depth/Diameter: .250/2.210

Intake Valve Depth/Diameter: .250/2.210

Year Range: 1966-1969

Oversizes: .030, .040, .060

Stroke (in): 4

Bore Diameter IN: 4.12

Bore Diameter MM: 104.6

Compression Height MM: 40.3

Alloy: 390

Pin Diameter (in): 0.98

Oversized: Yes

Pin Configuration: Centered

Crown Type: FLAT TOP 2V

Stroke (mm): 101.6

Base Number: KB304

Year From: 1966

Oversize: .030"

Rod (mm): 168.402

Pin Number: 0980x300K

Year To: 1969

Rod (in): 6.63

OE Deck Height: 10.25

Pin Diameter (mm): 24.9

Make for Engine Family: General Motors

Grade Type: Performance