Just picked up an a4 for cheap and have been researching on sleeving it. Question is i know that they are already in a way "pre sleeved" if you want to call it with carbon fiber metal but i am thowing some boost its way and want to play the safe route. I have heard that the a4's can simply not be sleeved. Is this true? Also i hear that they can be sleeved but just barely..so is it even worth sleeving? Any help would be appreciated, for i am pissed and stumped.lol thanks guys

 

bump!! anyone??

 

Yes the H22A4 has FRM sleeves. Honestly, I have never heard that the H22A4 can't be sleeved. Guess maybe it might depend on what type of sleeves your trying to install.

Darton sleeves them;

http://www.darton-international.com/we_install.htm

They list H22/H23 so I would only assume that includes the H22A1, H22A4 and H23A1

 

I too haven't heard that the H22A4 can't be sleeved.Ya i think you can go for sleeving it.