which pipes
Road Captain
Joined: May 2014
Posts: 648
Likes: 35
From: San Diego
You can get away with just the exhaust, but you won't be able to maximize its performance without an air intake and tune. Go to the Exhaust section of the forum and see and listen to different setups that forum members posted. It will help you make up your mind.
Cruiser
Joined: Sep 2010
Posts: 105
Likes: 9
From: Shreveport, LA
Was running a canned powervison map before the supertrapp. After I put the supertrapp on I went & had it dyno tuned - - money well spent!!
Stellar HDF Member
Joined: Jun 2014
Posts: 2,062
Likes: 153
From: Midlands of SC
An update as promised. I purchased the v&h 21869 quiet baffles to go in my bss. Removed the set screws for the baffles and end caps. End caps were aggravating to wiggle off, but old baffles slid out with my finger. I was shocked they were that loose. Wrapped some cheap masking tape around the leading edge of the fiberglass wrap to keep it from sliding down towards the trailing end of the baffle as it got slid in. Learned this from another post. I wiped the inside of the pipes with a rag and wd40, just like cleaning the shot gun barrel, and they slid in without much fanfare. Hardest part was lining up the holes for the set screws that hold the baffles and the end caps. Way longer to do this than any other step. A little fingernail polish on the threads and good to go. Three things happened, the volume went from 6-7 to about a 5 with a much deeper tone. The sort of tinny sound has completely gone away. Most of all the deceleration blap, blap, bang has all but gone. It still there at times but only a little and at a lower volume that makes it pretty much unnoticeable. Sorry for the long post but I wanted to spell out the answers to the questions I had in case someone else runs into these issues with bss. Funnest part is I bought them through my dealer to save shipping costs and when talking to them they haven't ever installed these before and was not sure if it would cure my issues. He said everyone is looking to get louder with more blap, blap, bang. Go figure.
Novice
Joined: Sep 2012
Posts: 22
Likes: 0
From: Sydney, Australia
Just wondering if you can get the same effect as the V&H quiet baffles, by wrapping the stock baffles with fiberglass matting? I have seen it done on other posts and it seems to work, but that is only listening to sound clips of before and after. have not heard the difference 'in the flesh'.
Stellar HDF Member
Joined: Jun 2014
Posts: 2,062
Likes: 153
From: Midlands of SC
I don't think wrapping the stock baffles would hurt but as far as V&H goes the original baffles are cheese grader looking that's in a slow spiral rotation. I guess this to give the spent gas a rotating effect to speed up its process out of the chamber like water gaining speed in a spiral motion out of the drain in a tub? The quiet baffles I installed has a solid blank at the head pipe end of the baffle that forces the gases around it and through the glass matt and then through cheese grader baffle and then out of the end of the pipe. I guess this solid end is what gives it some back pressure. It sure seems to help in the low-mid range torque as well, or it seems to anyway.
