people i just bought my track car from had one in and said it was shite aswell , you have to bed them in for 1500 miles apparently
they said it just slipped all the time on track , which isint much good in a race
i rekon you will need tripple plate exedy or simillar with that power
i get no slip it did a good 1000 miles running in aswell, all gear engagement problems for me it holds the power no problem.
i have been looking at the exedy tripple, also os giken quad plate r4c looks good only £1300 aswell.