I don't know if it's even worth posting but I just killed a RB with the followind add-ons:

Hypertech
Deleted Cats
Flowmasters
K&N cold air intake

We raced from a dead stop. i peeled out of course but quickly passed him. I had about 4 car lengths by the time I hit 70. I figured there's no way he'll catch me at that point so I let off of the gas. Plus I was in an area infested with cops so I didn't wanna go any faster.