Or a more effective hydraulic handbrake. Our state runs bitumen Gymkhana events, and a hydraulic handbrake with a small bore ( 5/8") has no trouble locking the rear wheels in handbrake turns around bollards. The handbrake has a long handle, and the hydraulic handbrake does need to be braced abd bolted securely to prevent mounts flexing ! Note that the viscous coupling is a very tight Ralliart item !!