I have just installed a Solas Concord ST-CD-15/20 on my 99 XPL (this has been recommended by others). Went for a test run today and it performed really well, however the revs at WOT were much lower than expected (6200rpm). I was expecting 100 - 200 rpm loss only not 1000 rpm!
Anyway, I later found that a hose from my RAVE valves to the solenoid had come loose, so this explains the big loss in rpm :redface:. This has now been rectified and weather permitting I am going to do another test run tomorrow. I have a feeling my arms are going to be sore tomorrow