I have a set. They are not in the best condition. i had head light covers on and must of left my lights on. the lens melted a bit. They work fine tho. Pm me if your interested.
A 4mil motor should make between 30 to 120hp. It all depends on how it was built. Honesty, with with the info you have given, id say you'll be at 45-50 hp
I just had fireball build me a set of +3+1 aarms. They are great! I had a set of asr's on before. Like those arms as well but when i turned the bars hard they would bind up? The fireballs work flawless!