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Engine Compression

COMPRESSION SPECIFICATIONS

Application Compression Ratio
2.5L (VIN A) 8.3:1
2.8L (VIN R) 8.9:1
3.1L (VIN D) 8.5:1
3.8L (VIN L) 8.5:1
4.3L
VIN W & Z (Except Turbo) 9.1:1
VIN Z (Turbo) 8.35:1
5.0L (VIN H) 9.1:1
5.7L (VIN K) (1) 9.1:1
6.2L Diesel (VIN C & J) 21.3:1
6.5L Turbo Diesel (VIN F) 21.0:1
7.4L (VIN N) 7.9:1
(1) Compression ratio is 8.3:1 for vehicles with GVW greater than 8500 lbs.