Loudest slip-ons with good sound

If I stay with the stock header and stock air clean and go the Street Cannon route, do I need a tuner? Or would I at least need the FL-ViED-10? Thanks!

Actually I found my own answer online. Harley says no tuning needed.

But...

I was thinking about using these H-D Street Cannons with the stock head pipe with the cat removed. Then would I need a tuner and if so would the FL-ViED-10 suffice?

Thanks.
 
The VIED is good for up to 6% over stock AFR... I would say with increased flow of a decat. .. a tuner would be required
 
The VIED is good for up to 6% over stock AFR... I would say with increased flow of a decat. .. a tuner would be required

Ok thanks. More decisions, drill out baffles, HD Cannons, full exhaust guess it depends on how much money I want to spend and right now that would be not too much.
 


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