performance exhaust

what would be the better exhaust system on a harley 117 build, the boarzilla 2:1 or the rush stepped 3 2:1 ? just a opinion

You have now opened thed the floodgates. Be ready for what's coming! Welcome to bike-talk.

In all seriousness, are these the only choices? Personally, I would choose a stepped pipe over a non stepped pipe.

SNS has a new 2 into 1 sidewinder with stepped headers you might want to check out too...




http://www.sscycle.com/product/Super-Sidewinder-2-into-1-Exhaust-System-p25570.html

Well it all depends on how you would like the power band to be and what cam and head package you have?more information please we don't have a crystal ball. And what year and model bike you have this motor in would be nice also .

the 117 build was a 107 with 123 hp & 126 tq. stage 4 hds w/bottom end, tranny & clutch upgrade & 662-1 cams along with v&h true dual hi outputs. upgrading cc & cams

oh yes 2011 street glide

Well if your running those kind of # I don't think your gonna see much difference with an exhaust change those are some very good numbers for a 117 .must be some very good heads and you must be running a 2 inch min intake and a 1.600 exhaust valve if not larger .if I was going to put on an exhaust on a motor that size I would try the fuel motor 2 into 1 e series pipe fully tunable and will make power all around the curve .you have a stout 117 with a great combo of parts to make those numbers .I would have a hard time making a change.

Do you like that Tman cam? I am in the process of building a 117 and have considered that cam but have opted for a different one.

Those #''s are on my 107 at the present time. Had it bored to 107 before the bike had 3 miles on it. (123 hp / 126 tq ) with the 107 build and V&H true dual hi outputs The 117 should be ready this week. Was seeking input on a 2:1 exhaust system. You are right, those are good #'s for true duals, curious whether 2:1 could have done better as have been suggested.

The 662-1 is the cam in the 107 build. worked dawn good for me, I posted the #'s going with 662-3 with 117.

Definitely looking to improve on those #'s with the 117 build. My curiosity is, is the 2:1 always the better performance pipe. The true duals served me well as the #'s indicate with the 107 build.

The answer to that question is relative to a lot of other variables. If you have a good stepped true dual, it can out perform a 2:1 pipe. A lot of it depends on your desire of where you prefer to ride. (Rpm range). 2:1 systems tend to be more efficient to left of the curve as the true dials tend to be more efficient to the right of the curve.

What is your intended use for this 117?

This cam is right handed. If it were me, I would stay with true duals.

Well you better have some serious compression to run the -3 .268 degree of duration and a close of 61 degree on the exhaust that cam is designed to blow off a lot of cylinder pressure and come on way late in the rpm that's a right side cam and on a heavy bike will feel lazy .so set the 117 at 12.0 to 12.5 .

He said that it is about ready to go. More specific build details would be nice huh?

If he is set at 12:1 static his ball park corrected is what about 10.25:1 to 10.5:1 assuming standard hi performance set up? Pushing it for pump gas but doable.