I have a uk 4efe and 5efe. Ive just measured the intake cams and they are different. Does anyone who owns verniers able to measure their cam lobes. 4efe is 40.8mm intake 41 exhaust 5efe is 41.8 intake 41 exhaust Although the 5efe has less duration. The 4efe has low miles and the 5efe has starship miles so I cant blame wear on the lobes