Picked up this hydraulic line lock today thanks to a link in the e-brake delete thread.
Simple, cheap and hopefully effective at isolating the rear circuit to make a lock for my hydro handbrake.
There were a few hydro options with mechanical locks but I didn’t like the design and mechanism which looked like it would get bent or give teouble over the long term.
For short bursts moving the car around the pits and general stuff if should do the job.
Competing against newer cars with all the launch control etc, it even help even up the playing field with starts.... particularly hillclimbs and motorkhana.