KB Hyper Performance Piston Kit, KB251KTM.020

1 Set KB251.020/1 Set 4342AM8.020

Centered pin. Suggest checking quench dome with clay for clearance. Closed chamber heads require the quench dome to be machined down. Made from Chrysler 400 block. Use only stock rods. Comp. ratio will change with quench dome machining.

Sold As: Kit with Rings

Engine Manufacturer: Chrysler

Engine Family: Mopar Big Block B

Engine Displacement (Liters): 7.4

Engine Displacement (cubic inches): 450

Bore Size (in): 4.342

Bore Size (mm): 110.3

Piston Head Type: Dome

Crown (cc): -4.4cc

Compression Ratio: 72-12.9, 80-11.8, 84-11.3, 88-10.9

Top Land: 0.221

Pin Type: Press or Floating

Pin Diameter (mm): 27.8

Bore Diameter IN: 4.342

Compression Height IN: 1.722

Bore Diameter MM: 110.3

Compression Height MM: 43.7

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

Oversizes: STD, .020, .030, .040, .060

Stroke (mm): 95.3

Pin Configuration: Centered

Year Range: -

Stroke (in): 3.75

Exhaust Valve Depth/Diameter: .264/2.360

Rod (in): 6.358

Base Number: KB251

Pin Diameter (in): 1.094

Intake Valve Depth/Diameter: .264/2.360

Oversized: Yes

Rod (mm): 161.4932

Pin Number: 1.094x300K

Grade Type: Performance

Piston Material: Cast 390 Hypereutectic Alloy

Alloy: 390

Crown Type: .260" STEP HEAD 2V

Lock: PRF116-3

Oversize: .020"

OE Deck Height: 9.98

Make for Engine Family: Mopar