I got my Jag back today. It was in the shop while I was on vacation to have the horse power upgrades along with a K40 integrated radar detection/laser jammer put in. The dealership, Jaguar of Novi, has told me that that it should be roughly 100 horse power faster.  I expect to put that to the test soon but in the meantime, I'm pretty skeptical. What they did was change the exhaust to the Remus exhaust. It adds 20 horse power at the flywheel (12 at the wheel). Then they upgraded th...