Darkhorse... if you want performance... ask for $2500 worth... thats what mine cost.. 25,000 miles later, it will take me to hell in a hurry.

 

+1 on Darkhorse AKA Hoban Brothers. Lesser known but have been around a long time is Falicon. Don't know how their pricing compares to Hoban.

 

Chad, are you still running the 113"?

 

James I am running an R&R 103 stage 4. What I would like to do is do my cranks and bump up to a 107 which i think would be a fun ride with R&R's heads and all that. I emailed darkhorse so hopefully they get back to me soon

 

What kind of numbers is that build making? I'm seriously considering a BB and head work on my 96" this winter but I think I'd rather stay with cast pistons which means 103 would be as big as I could go. Curious what your R&R build is putting out. Also what cams and compression are you running?

 

Nobody has mentioned Revolution Performance in this thread. They have a pretty good you tube video out on this subject that looks like they know what to do...

 

James I have 104 hp and 114 tq hp numbers are a little low mainly from my exhaust. but it is fun to ride and I'm happy with it. I have read a little about rev performance. seems people speak a little more highly of dark horse

 

I think Dark Horse has been doing it longer. Those are good numbers. What cams and exhaust? Sorry I got off topic...

 

I have sinisters up yours exhaust and the 615 gear drive cams.

 

actually I mentioned them earlier and they are good