i never said you said you gain 10hp, i said "its funny how honda boys have claims of 10hp" it frees up power but not a significant amount. The good amount of weight you are talking about it no more than 75lbs depending on what you plan to remove. This thread:
http://www.sr20-forum.com/howtos/119-official-weight-reduction-post-reborn.html states that "Air Conditioning (40 pounds)
Power Steering (8 pounds)" 48 lbs, thats a nice amount of weight to shed. But dont let all the hype other people start about removing ac/ps get to your mind.