Borezilla... Is it really worth 5 or 10 horsepower? 117" build. Need feedback!
 

Well we are getting to the end of my 117" build. I'm currently running a thunderheader and truly don't want to spend another 1300.00 bucks on a borezilla pipe w/ghost. My question.. is the thunderheader truly going to hurt the performance that bad. I'm a big fan of torque and I know for certain that the thunderheader will deliver. Here is the build.


2009 Street Glide
Hillside Stage 5 heads w/ manual comp releases(09 castings ported ALOT!!) :) about 10-8.1 compression
Woods 188 valve springs
S&S 117 cylinder
Flat top pistons
58 mm SE throttle body and injectors
Woods 408-6 cams (chain
S&S roller rockers
SE push rods
Big Sucker Stage 2 AC
Aim Clutch w SE spring
Fueling (cam plate ,lifters and high flow oil pump)
Thunderheader 2 into 1 w/ghost
SERT is the tuner

I would use as big of a pipe as possible. The engine needs to move air not only to make power but to keep the possibility of detonation down. It will be alot easier to tune because of it. Low flow makes heat buildup but im sure your engine builder has already told you this. Looks like its going to be a good build.

I thought thunder header has a big bore pipe now. I havent heard much about it.

Go with a Rush Reaper or Dragos 2 into 1. 3" baffle will get r done!

Spent all that money on motor I say let her breathe, why start skimming now? :icon_greedy: