 Complete the following phrase:  HSV owner Tom Walkinshaw and his longtime TWR driver Jeff Allam drove a TWR entered SV in the 1988 RAC Tourist Trophy race at Silverstone on 4 September, finishing 15th. The car proved itself quick but not up to the speed of the Ford Sierra RS500s. Walkinshaw found the Commodores performance level to be about the same as the factory Nissan Skyline GTS-Rs. TWR also raced the SV at the 1988 Tooheys 1000 in a joint effort with the Perkins run but TWR owned HSV Team. The car was retired after just 5 laps with rear suspension failure. Walkinshaw himself was cross-entered in the PerkinsDenny Hulme car for the race. That car was retired from 2nd place after 137 laps with engine failure, a rare thing for a Perkins built engine. This was also the last time Tom Walkinshaw raced as the 1984 European Touring Car Champion retired from driving after the event. The best result for the new VL in its first year was when Perkins and Holden Special Vehicles team mate Denny Hulme scored a 12 result in the Group A support race at the 