I'm not too much into top speed, especially on the street. I stick to marking off the 1/4 and being done after that. I did cruise the car on Thursday at 110 mph for a 1/2 mile to test the DSS one piece driveshaft and it was smooth as silk lol.
Only a little over 400 miles on mine, so 110 MPH is as fast as it has been for now.
My Lethal Performance X-pipe and SCT tuner should be here Thursday or Friday. After the install I plan to find a nice safe place to do a good 3rd-4th-5th gear pull!