my dad has the silver edition rx1 2003 with some mods, (K&N filters, clutching, ripsaw, nitrous, engine work) when my dad does not use the nitrous I can take him the entire race no problem. I take him out of the whole and mid range I destroy him, but havent done a all out top end race with him yet, I am so far ahead by a 1/4 I just let off. The rx1 is not slow, but my srx can take it.