KB Hyper Performance Piston Set, KB370.030

KB Hyper Piston - Pont 389 Rod 6.630 Flat Top +3.5cc 2V

Centered pin. Designed for 20 degree heads, 1966 and earlier. This piston will not work with 14 degree heads. Check small end of rod to piston before assembly /.045" clearance per side minimum.

Sold As: Piston Set

Engine Manufacturer: Pontiac

Engine Family: Pontiac V8

Engine Displacement (Liters): 6.4

Engine Displacement (cubic inches): 389

Bore Size (in): 4.0626

Bore Size (mm): 103.2

Piston Head Type: Flat

Crown (cc): +3.5cc

Compression Ratio: 71-10.7, 87-9.2, 96-8.5, 111-7.6

Top Land: 0.2

Pin Type: Press or Floating

Rod (in): 6.63

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

OE Deck Height: 10.25

Make for Engine Family: General Motors

Year From: 1959

Stroke (in): 3.75

Oversize: .030"

Bore Diameter MM: 103.2

Bore Diameter IN: 4.0626

Compression Height MM: 43.7

Compression Height IN: 1.72

Oversizes: .030, .040, .060

Base Number: KB370

Rod (mm): 168.402

Crown Type: FLAT TOP 1V

Piston Material: Cast 390 Hypereutectic Alloy

Pin Configuration: Centered

Pin Diameter (in): 0.98

Pin Number: 0980x300K

Exhaust Valve Depth/Diameter: .237/2.100

Alloy: 390

Intake Valve Depth/Diameter: .237/2.100

Lock: PRH107-3

Year To: 1966

Stroke (mm): 95.3

Year Range: 1959-1966

Pin Diameter (mm): 24.9

Oversized: Yes