You didn't say...if that's a US$ figure, you got bit pretty bad.
Not to worry. From what you say, you have the right pipe.
There is a lot of confusion over only two choices (from FmF) that really doesn't need to exist.
They make two pipes for the KDX (referring to the newer 'H' series). They are called lots of different things, but still.....there are only two. One is a high-rpm profile, a rev or desert pipe, one is a low/mid rpm profile, a torque or woods pipe.
The letters may vary (and sometimes pipes are labled incorrectly!) but a rev will have a -30 designation and a torque will have a -35 designation.....these numbers usually stamped on one of the mounting tabs.
Part of the confusion comes courtesy of FmF themselves. They mix the 'names' of their pipes from the 200 to the 220, calling it one thing for a 200, something else for a 220.
Both pipes have the same profile impacts on both kdx displacements. The rev is 'upper', the torque is 'lower.'
Yes, the port timing and carb differences between the two bikes would make the same pipe act differently if put on the two different kdxs, but that's because the bikes are different from the git-go. Most any pipe will make those differences stand out.
The torque (woods) is the choice of more than a few 220 riders. If it's bottom end you are after, you picked the correct pipe.
If you end up buying a 'rev' pipe to compare....try to find a better price! ;) $189/US is usually easy to find.