ae86 redline?

[Ivan141]

I'd say buy yourself a shiftlight if you think you can control any over revving, that way you get a warning for not much investment. Otherwise fit stock ECU for ignition only, or megasquirt 'n spark or some other aftermarket ignition ECU (the aftermarket route will require lots of tuning).
I dont know of any products you can buy of the shelf to install as a rev limiter. I could make such a thing but I doubt it would do the engine any good with my knowledge about what cutting sparks does Furthermore it wouldnt be interesting since about 1 people wants such a thing.