Hi guys I'm kind of in the wrong section because I have a dyna,but you guys seem to be the most help.So my question is I have a 2012 Superglide with 2,000 miles and I was thinking about doing a FM 107 kit.Now I'm thinking of going with maybe a set of 555's and Kompressor heads.What are your thoughts? How much of a gain will the heads make going from 9.2:1 to 10.3:1? I'm just looking for something a little different ,I never see much about these heads so maybe thet aren't worth buying I can get them for a little over $500.Thanks for all the input.

 

any reason youre not just gonig to send your stock heads out?

 

I guess I was mainly looking for the bump in compression.

 

You can send them to fuel and have them set the compression where you want it.

 

you can send them to any number of places. google big boyz head porting. bean will talk your ear off about heads, CCs, compression, etc.

 

+1 On Big Boyz head porting, that's who did mine....Your stock heads will flow as good if not better than the Kompressor heads with some port work, thats where I'd put the $500, in porting! Just my .02 though.

 

Do you guys think with the ported heads,555's,Powervision,and either a Fatcat or Propipe I will be at atleast 100/100? Right now I have short shots,A/C,and the harley download.

 

you will be around 85-90ish/100ish with my best estimate.

and big boyz will charge you about $350 to do your heads. they are literally the best value in the motor industry

 

I made the mistake of using Kompressor heads. the only thing they really do for you is boost compression. You will not make your numbers with them.

 

So it sounds like I'd be better off just doing the 107 kit even if I don't get the heads ported when I do it