How do you make tru duals quieter?
Thread Starter
|
4th Gear
Joined: Nov 2007
Posts: 8
Likes: 0
From: North Carolina
How do you make tru duals quieter?
Ok. I know I'm going to catch some flack here. It was cool in my younger days, but I'm really tired of the noise and stuff like setting off car alarms everyday when I pull in the parking garage at work.
I currently ride an '07 FLHTCU with the 103"/255 cams-tru duals w/quiet baffles. A friend of mine has an '08 with the same setup and has tried wrapping the baffles; and after that didn't work (stuff eventually burned out and it sounded different every time I saw him), he welded a washer on one end. I really liked the way it sounded with the washer setup but, when he got it dynoed, he said he lost 23HP.
I had stock pipes when I did the 103" upgrade and the sound and power was fine for me. I went to the duals because that stock cross over pipe was cooking the biscuits. I thought I could adjust to the sound, but it's just not happening. My dyno numbers right now with the quiet baffles are 80HP & 103TQ and I wouldn't mind sacrificing a few numbers either way.
I'm sure we're a minority, but I know there's got to be a few "sound sensitive" guys out there that have found the right solution. Any suggestions (except stuff like "buy a bmw") would be greatly appreciated.
I currently ride an '07 FLHTCU with the 103"/255 cams-tru duals w/quiet baffles. A friend of mine has an '08 with the same setup and has tried wrapping the baffles; and after that didn't work (stuff eventually burned out and it sounded different every time I saw him), he welded a washer on one end. I really liked the way it sounded with the washer setup but, when he got it dynoed, he said he lost 23HP.
I had stock pipes when I did the 103" upgrade and the sound and power was fine for me. I went to the duals because that stock cross over pipe was cooking the biscuits. I thought I could adjust to the sound, but it's just not happening. My dyno numbers right now with the quiet baffles are 80HP & 103TQ and I wouldn't mind sacrificing a few numbers either way.
I'm sure we're a minority, but I know there's got to be a few "sound sensitive" guys out there that have found the right solution. Any suggestions (except stuff like "buy a bmw") would be greatly appreciated.
Road Master
Joined: Sep 2007
Posts: 1,044
Likes: 13
From: Broken Bow Oklahoma
I tried many things on mine, and found that the older non-cat mufflers with the two plugs drilled out are not too loud, I welded a drill bit to some steel rod. and did it all myself. it is a little work and if I did it again I would have drilled only the plug in the engine side and tried it like that if I wanted quiet. but the power was better with both plugs drilled out. both plugs out is a bit louder than I wanted, but I was not willing to give up any more power.
Road Captain
Joined: Feb 2009
Posts: 577
Likes: 0
From: North Carolina
Trending Topics
Road Captain
Joined: Mar 2007
Posts: 531
Likes: 0
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Stage III
Joined: Jun 2009
Posts: 3
Likes: 0
I have a set of Vance Hines true duals on a 2009 UltraC and tried Monster Ovals and found they were way to loud. Went to Super Traps and they are perfect. Quiet when cruising yet a bark when I really get on it. Nothing will be as quite as stock so pick your poison.
Outstanding HDF Member
Joined: Oct 2006
Posts: 2,263
Likes: 36
From: Georgia Mountains
Supertrapp SEII's are supposed to be only 3db louder than stock.
Check with FuelMoto