I have 3M on my ducktail and tested it to 170 kph.
The duck tail has much more contact surface than your spoiler.
With your spoiler i would drill holes and also use 3m to seal water away from the drill holes.
Worried the drill holes will rust.... Spray something like this Rust Protection & Lubricants
before you install in the drill holes and bolts
The duck tail has much more contact surface than your spoiler.
With your spoiler i would drill holes and also use 3m to seal water away from the drill holes.
Worried the drill holes will rust.... Spray something like this Rust Protection & Lubricants
before you install in the drill holes and bolts
