We ran 2 boxters for a few years in Grand Am at Speedsource. Dead solid reliable for the most part. Have to stand on your head or pull the motor to do almost everything. Weak point is power steering will puke fluid almost every session. Add an overflow tank. I do not think they ever had a manual rack, could be wrong. I will be surprised if they have any time to deal with one until after Daytona. Thrashing to get all the cars ready. David Haskell built the motors for all the boxters and the GS cars as well. Does good work and reliable.