This thread is indeed informative. I'm going to craft my own take-a-way.

The NA Crossie HP is same as the Merc - 255 from factory. That means, all my mods have added about another 45 hp, which brings me up to 300 hp. No wonder my car feels so darn quick now.

It always felt quicker than the advertised 215 anyway. Whether it's true or not, I'm going to say I'm now a 300hp car!!!!!!!!