does magnaflow make a catback? how does everyone feel about k&n filter replacements. i know i put them in my previous cars and liked the extra boost. but i was looking for someone who has them installed, and ask them how much of a difference they make in the crossfire. i looked at the two guys who have intakes, and i think saskins has the right idea. not to take away from mcjack? but it looks like saskins went along with Mercedes' original design. are they for sale do you know?