Gtech Performance Meter/Pro
Just Plug In And Go
Reads: 0-60 Time, 1/4 Mile Time And Speed, 60-0 Braking Distance, Horsepower.
It can also measure G forces around corners too
Check to see if your Performance mod's are making a difference, or make sure it's not getting worse.
Boxed with instructions. Its as accurate as the info you put into it.
I used this on a a few cars and is great for trackdays!!
£50 (delivered to your door)