The Jota package is an option that owners have. While it is not legal to have it on the car that is about to enter U.S customs. There are SE30 owners out here who do have that package. Plus, given that it is an intake modification, it shouldnt really have problem with passing smog... Unless we are making the argument that the aftermarket exhausts owners are running now are not legal. Because, technically, exhausts from the cat back are legal, as with K&N filters for intakes. Which is what the Jota package is, a big big intake. It doesnt push more fuel, it merely amplifies the amount of air into the engine and creating better efficiency. The only thing with aftermarket exhaust is that it needs to confirm with sound decibel requirements(which I highly doubt anyone here with an aftermarket exhaust will pass) Cops can still pull you over for having a "modified exhaust". As to being street legal, the Se30 even without the JOTA package was derived out from the gentlemens racers diablos and have many racing tricks and should run head to head or slightly faster than a 6.0 both on track and strip. The weight factor is the biggest thing. The 6.0 has a much higher parasitic loss than a 2wd diablo. Imagine the loss of pwer to drivetrain as 30% on a car, then with 4wd, that loss of pwer becomes greater. Even with more power from a 6.0, it would only mean that it is offsetted by the loss of pwr to the wheels. Being that the requirements are all-out performance, SE30 is all out performance. The 6.0 still is more of a road car that is civilized and I hold it as my favorite diablo. But, being the most performance, the SE30 takes top honors for me.