I have the red FIA type isolator unit wired into the rally car.
Like @lynx says you can wire one of these in with a fuse bypassing it locally with a low enough rating if anyone tries to start it it’ll pop the fuse without the key in and it’ll go dead.
I had one hidden behind the centre console of my road car when I was at uni because I lived on the outskirts of the north East’s answer to a war zone
I have the red FIA type isolator unit wired into the rally car.
Like @lynx says you can wire one of these in with a fuse bypassing it locally with a low enough rating if anyone tries to start it it’ll pop the fuse without the key in and it’ll go dead.
I had one hidden behind the centre console of my road car when I was at uni because I lived on the outskirts of the north East’s answer to a war zone