grades

With every other car I've ever owned, I've just change from D to a lower top gear selection (so typically from D to 3 or 2) to handle steep grades and used the brakes as needed when engine braking wasn't sufficient. With the L405, it looks like I've got a chance of switching the transmission to...

What performance up grades would you do the engine side of things? Kind of thinking i need to freshen some stuff up on the motor for some more power. Maintenance wise its pretty much perfect now. its not leaking and everything functions correctly. The ignition system is part of the future...