I get around 4.8-4.9 in manual mode on a regular street surface. I have Takeda CAI, Litespeed CBE, and PSS's. I have trouble getting optimum power down in 2nd. I either gas it too much and spin or not enough and bog down a bit. Getting it right would probably drop me down one or two tenths. Stickier rubber would definitely make 1st gear much faster.

My tests were done mid January at about 40* F.

Are there any other threads that show people's 0-60 with mods. Or can people continue on this thread :)

Would like to know what our Zs do with mods.