I have a 421 serval with 35 a/s pwks and R2 pipes. Currently running fast clutch with 6hd springs. I'm not really having a problem with it slipping but more or less trying to prevent it. I don't have a lock up cover and don't really know alot about either one. Just know that I don't need to get the cover for the slingshot. Do they hold the same amount of hp? Are they both easy to adjust/ install? Let me know what you guys think.