First post, please bear with a newbie to this forum

I bought a 2007 Fatboy brand new about a year ago ... IT'S AWESOME !!! I already changed the airfilter to the Arlen Ness Big Sucker, ThunderMax EFI plus the O2 sensor kit and a set of Vance&Hines Big Shots without the silencer.

Result, about 25% more power on the dyno and totally obnoxious exhaust sound, so much, I keep setting off car alarms everywhere I go - I use it even to commute to work in Central Tokyo, so ... as much as I love it, I am looking to lessen the sound level without sacrificing my performance gains

Any recommendations on more "healthy sounding" exhausts, I don't believe the silencer (4db) for the big shots will make that much of a difference ? Is there a website I don't know of, where I can compare sounds ?

My local dealership is forbidden by law to manipulate anything in regards to the exhaust, and the custom shop who helped me so far isn't so helpful (guess they want to capitalize on my trial and error) ...

 

You mean you got a set of V&H's without the baffles? They must have been used. You can go on Eastern Performance (a sponsor on this forum) and order a set of Quite Baffles and install them yourself.
Good luck & welcome to the forum,
Marsh

 

They were new, the shop that installed them was incompetent I guess they also installed a faulty EFI module, I had another guy replace for me

Will the baffle really do that much ? I mean, 2-3db sounds like a very very little difference

 

Yes they will. You won't set off car alarms but it will sound good and as long as you don't get on it it will be legal in most places.
Marsh

 

Thanks mate, I'll look into it ...
Had disregarded them due to the low db number

 

It will be a big difference.
Tom

 

I believe it's a 2-3 db difference between the quiet baffle and the stock baffle. If you don't have any baffles at all then there should be a huge difference.

I hope so at least, I just ordered the V&H BSS with the Quiet baffles to go with my new Thundermax with autotune and Arlen Ness Big Sucker Stage II.

 

Bear in mind that the db scale is exponention - 3db is a lot!!!

 

You will most likely see a bit of a performance gain especiallyin the low and mid range.Engines need some back pressure to operate properly.

 

Hello and Welcome,

I have a similar set up, with BSS and Quite Baffles. I was curious as to the difference on the stock exhaust and the BSS quite baffles. Here is what I found:



Standard Harley pipes at idle 90db

V&H BSS quite Baffles at idle 93db

This is by no means a scientific comparison, but it is what I found on my change of pipes.

BTW I love the sound when the throttle is cranked open!!