Yeah, I totally agree with both ddgonzal, and Dodgeman.

You really have to decide what you want to do with it, if you want to have good power but on a budget then go the Hitachi's or SU's. But if you dont care on $$ then get the Dellortos, but like Doggeman said, you will have to open up the engine and do some $$ worth of work.

I got the twin 40mm sidedraught Dellortos on my ute, it goes really hard, lights up the rears no problem if you dump it at the lights and is just fantastic. BUT it has had about $15k spent on the engine by the previous owner...