Looking into changing out exhaust....

[Curt_]

Is there a difference between 3.5 inch or 4 inch? Other than the obvious size.

 

[gator508]

Welcome to the forum from Gulf Coast AL. Depending on the baffle you will get a deeper tone with the larger exhaust and not as much back pressure.

 

[Curt_]

Welcome to the forum from Gulf Coast AL. Depending on the baffle you will get a deeper tone with the larger exhaust and not as much back pressure.

Thank you. I wasn't sure if there was any performance difference between the 2.
I'm gonna gonwith the 4 inch it looks like it flows better with the bike.

 

[gator508]

Thank you. I wasn't sure if there was any performance difference between the 2.
I'm gonna gonwith the 4 inch it looks like it flows better with the bike.

An additional thought, most Harleys are running lean from the get go and you will be leaning it more with a free flow exhaust, so I would suggest you look into a fueler to increase the A/F ratio.

 

[Curt_]

I have a fp3 and an arlen Ness big suckered stage 2 installed aswell

 

[gator508]

I have a fp3 and an arlen Ness big suckered stage 2 installed aswell

You should be good to go, may have to change FP settings after exhaust change.

 

[Curt_]

You should be good to go, may have to change FP settings after exhaust change.

Yea im gonna need to refresh a new map