Borla makes one for the 2.7L which is the exact same stinkin thing as the 2.4L. Same exhaust head, etc, just bored over. TRD does make one but only for the extended cab, not for regular cab. BUT to me I think the borla or a custom Flowmaster kit sounds alot better than the TRD. But that's just me.
I used a 2 chamber flowmaster and dumped the pipe right after the mufler. It's pretty dang loud if you ask me. It really helped power in the higher RPM ranges but actually hurt it a little on takeoff. But, mines an automatic too.
I have heard from people in the honda sceen that the iceman intakes work very well because they are made of plastic not metal and the don't let the air inside the intake heat up as much. That's just what I've heard, can't speak from experience or anything.
I have the Gibson on my POS 93 Ranger 3.0L V6. It was under $200 and I bolted it on myself. The quality is good, 2 1/2 inch piping, sounds mean, and comes with a nice chrome tip. The one thing about the gibson is that it clamps together the piping instead of bolting it together.
Personally I would still go with the TRD exhuast, that is if money is not a consideration. A stainless steel exhaust will never rust, one less thing to worry about. I also think the quality of the welds on the TRD exhuast are very nice.