KB Hyper Performance Piston Set, KB370.040

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

Pin Diameter (in): 0.98

Piston Material: Cast 390 Hypereutectic Alloy

Alloy: 390

Crown Type: FLAT TOP 1V

Stroke (in): 3.75

Intake Valve Depth/Diameter: .237/2.100

Exhaust Valve Depth/Diameter: .237/2.100

OE Deck Height: 10.25

Oversize: .040"

Bore Diameter IN: 4.0626

Bore Diameter MM: 103.2

Compression Height MM: 43.7

Compression Height IN: 1.72

Pin Number: 0980x300K

Stroke (mm): 95.3

Make for Engine Family: General Motors

Pin Diameter (mm): 24.9

Rod (mm): 168.402

Year To: 1966

Year Range: 1959-1966

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

Oversizes: .030, .040, .060

Lock: PRH107-3

Year From: 1959

Oversized: Yes

Rod (in): 6.63

Pin Configuration: Centered

Base Number: KB370