Engine Compression

COMPRESSION SPECIFICATIONS

Application

Compression Ratio

4.3L

VIN W & Z

9.05:1

VIN Z Turbo

9.3:1

5.0L (VIN H)

9.1:1

5.7L (VIN K)

⁽¹⁾ 9.1:1

7.4L (VIN N)

7.9:1

⁽¹⁾	Compression ratio is 8.3:1 for vehicles with GVW greater than 8500 lbs.