After months of troubleshooting, the Jaguar XJC V12 finally hits the dyno. With a modern Emerald ECU, larger throttle bodies, and a refined exhaust, power jumps from 285 to nearly 350hp. The result: ...

We put our E46 M3 CSL on the dyno to find out exactly how much power it’s making after years on the road. Known for its lightweight design and legendary S54 engine, the CSL is a special car — but how ...