While I don't have them personally, I have seen them on others cars. Those cams and Brenspeeds Detroit Rockers are the best performing street cams I've seen. I've driven my friends GT which has Kooks LTs, Comp Stage 2 NSR cams, Steeda UDPs, 3.55 gears, and a JLT CAI, and he can outrun me by a decent margin. Drives like it's stock, lopes smoothly, and pulls like a train above 3500.