[HiFlow5 0]

There is no power gains, see post by 5.0Pony that I just replied to.

Yes, it is easy to take off. I removed mine for appearance reasons, not for performance reasons. I wouldn't advise removing the pump if you plan on running cats or have strict emissions laws. The pump is there to feed fresh air to the cats so they don't clog up with carbon. If you do remove the pump you will need to plug the tube in the h-pipe and the thermacator holes in the back of the heads.

As far as check engine light goes Simi Stang, there shouldn't be any problems. Since there are no electrical connections to the smog pump and all it does in blow air to the cats. I can't see how it would cause a problem. If you were to remove all emissions components, EGR and such, then I think will start to run into problems then.