exhaust question
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Novice
Joined: Jan 2013
Posts: 15
Likes: 0
From: New Hampshire
exhaust question
I have a 2011 FLHTK.
I drilled out the cat on a header pipe I got on eBay.
I put the Rinehart 4" slip ons on and its ok but hardly enough thump.
What I'm thinking of doing is this.
Taking stock header decatted off and having the left side muffler port welded shut. So basically I will have a 2 into 1 system.
This with using only the right side 4" rinehart muffler. Hoping to increase toque and sound.
Has anyone tried this? Or knows of anyone who tried this?
Thank you.
I drilled out the cat on a header pipe I got on eBay.
I put the Rinehart 4" slip ons on and its ok but hardly enough thump.
What I'm thinking of doing is this.
Taking stock header decatted off and having the left side muffler port welded shut. So basically I will have a 2 into 1 system.
This with using only the right side 4" rinehart muffler. Hoping to increase toque and sound.
Has anyone tried this? Or knows of anyone who tried this?
Thank you.
Road Master
Joined: Jul 2012
Posts: 1,226
Likes: 7
From: Junction City, KS
Man..... I wish I had an answer, I wanted to use a stock 2010 2 into 1 and one of my twin slash mufflers! I bought a 2 into 1 anyways because I couldn't find an answer to this same question...... Didn't want to do it in fear of messing up my motor. I'm pretty certain you could do it, and everything would be just fine, just didn't have the ***** to do it, plus it would have been much cheaper.
Elite HDF Member
Joined: Jun 2006
Posts: 3,572
Likes: 5
From: Templeton California
There's a post on this very subject buried in the DIY tips and tricks thread.I see no reason why it wouldn't work but you may have to experiment with the baffle size to get the sound/backpressure you want.I have an extra stock header I've been thinking of doing the same thing with just to eliminate cleaning the left side muffler.update; its not buried too deep it's the first one
Last edited by SPECIAL ED; Nov 30, 2013 at 11:46 AM.
Elite HDF Member
Joined: Jun 2006
Posts: 3,572
Likes: 5
From: Templeton California
The stock header on the 09 and later bikes is a two into one all the way up to the end of the collector where the cross over is.I don't think you'd be doubling back pressure just blocking off the cross-over unless you were still using the stock muffler.If you have a stock muffler with the baffle removed you'll notice the end opening is about twice the size of the stock baffle and roughly the same size as a two into one muffler.If you already have an extra stock head pipe laying around you won't be out much $ to try it.
Last edited by SPECIAL ED; Nov 30, 2013 at 01:15 PM.
Road Master
Joined: Sep 2007
Posts: 1,044
Likes: 13
From: Broken Bow Oklahoma
I stuffed a rag into the left on my 13 limited with 4" rineharts , and the cat removed. the sound changed completely. It sucked, no resonance at all.
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MODERATOR
Joined: Oct 2007
Posts: 4,108
Likes: 1,964
From: New England
FWIW, about 80% of the exhaust exits out the right side on a stock system. Many have successfully closed off the left pipe completely for various reasons and had good results.
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Road Warrior
Joined: May 2012
Posts: 1,570
Likes: 117
From: Southeast NC
You cant do that. I dont know how much people realize this but building an exhaust system is an art and a science. an exhaust is just not a pipe bent to follow the lines of the bike. On a single sided exhaust u will notice that the diameter of the muffler is bigger than the 2 muffler system. there is a reason for this. Its all about flow and exhaust waves. Ask a guy like Jamie at fuel moto about this.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
You cant do that. I dont know how much people realize this but building an exhaust system is an art and a science. an exhaust is just not a pipe bent to follow the lines of the bike. On a single sided exhaust u will notice that the diameter of the muffler is bigger than the 2 muffler system. there is a reason for this. Its all about flow and exhaust waves. Ask a guy like Jamie at fuel moto about this.