Can't see how a properly setup nitrous will smash driveshafts.

Infact, videos of hire cars with it on, didn't smash shafts.

Regarding the regs, don't know - best to ask Motorplex. All I know is you need some stickers/markings on the car to say it has the funny gas.

If you are going down this path, it may be 'cheaper' to look at a drag tune with E85 / C16 / VP109. I'd only ever consider nitrous if it was to pass a certain time barrier i.e. you are stuck at 11.01 and need to get to 10.99. If you are doing a 13.5 and want to go 13.2, don't waste your time with it.

Also weigh up if the cost is worth it compared to just getting a different turbo/engine setup that nets more power.

__________________
[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]