Small update
I have just returned from technical control and unfortunately I have a red card because of exceeding the lambda values. So I have to go back within 15 days but it will be impossible because the Albert garage
will close until September 29. Really this is the last thing I could have thought with the plus four .
Just a thought.. Is the Plus Four filter and intake located in a smilar position to the Plus Six?.. The Plus Six intake is low down on the right hand side front wing. I have found that if the car is used in wet and mucky conditions ( Somerset lanes ) the lower 3rd of the filter can quickly become clogged. I have changed 3 filter elements in the last 18 months as compressed air could not clear it all out even when dry. I have also water proofed the underwing lower hatch plate that is removed to enable the filter element to slide out..