Yep,

for no efficiency chip, probably because not too many people who mod their cars are concerned about efficiency gains.
I would imagine that an intake would do well, make sure to change the plugs on occasion, regular maintenance, and get tires with low rolling resistance. BTW, from what I've read, a newer exhaust won't really increase gains by a measurable amount. The TSX already has twin pipes for a single exhaust, so there's more then enough piping.
And tell him to join! Maybe you'll have a math teacher with a ballin TSX! And that we're not a bunch of kids with Civics here, either. A lot of the discourse is very mature.