This past weekend I drove up to Willows California for the races at Thunderhill Raceway. Anyway, having just completed the boost controller install, I was cusious on how the new setting of 14.5 psi would act at high speeds and high RPMs, 4300 . Well, it was excellent. On my way up I averaged about 90mph with an average of 95mph on a 49 mile section of Highway 5. It has tons more power up there. At one point I decided to put the hammer down and see what it would do. Well, I hit just about 110-112 mph. It still wanted to go but I got scared because of the rpms. What is the exact redline? Anyway, I'm sure that I would easily have hit 115 mph. The car felt so much more stable than before because the power made the car so much more controllable. I recomend this mod to everyone!! Oh ya, just a little more information. On this 360 mile road trip, I averaged 22mpg with an overall average speed of 83.5 mph. Total distance divided by time. Much of the trip was at higher speeds but, traffic slowed me down a lot.