1. Should I change my si head to the RSX type S?
2. If so will it work?
3. wood i see a gain in HP or not?

 

1. Your choice, asking other people won't solve your problem. If you keep doing this you're building a car based on opinions of other people and not on what you want.

2. I'm guessing you're speaking of a k-series motor. If so then yes.

3. You'd prolly see some good gains, althought for the time+work+money you're gonna dump into a head, you may aswell just dump a full engine in. However if that's not what you're looking for I'm sure there would be atleast a few people here that have done the head swap, or maybe try the ephatch forum.

 

dont waste your money if your not going to get teh 6spd tranny too. and the A3 block shoulnt be reved over 7.5k

 

would it be beneficial to get aftermarket cams if it isn't good to go over 7500 rpm?