Newer (2014? 2015?) OEM touring pipes can be drilled
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From: Jax FL
Newer (2014? 2015?) OEM touring pipes can be drilled
the rear of the OEM muffler is just an old style FL Baffle, and the end of the tube has been pinched shut.
the 2014 pipes I had, only had the Clutch side like that. I have those on my bike now, and they are ALMOST perfect. (they are the "slash up" so I really like them)
however, the pipes off a 2015 FLHTKL had both pipes with the pinched baffle tube. They are "flat ends" so I have not tried them.
you can just slide a hole saw in there, and drill out the end of the tube.
it may only be 1 1/4 hole, but you should consider the newer than 2009 OEM slip on's are louder (flow more) than the old EVO and TwinCam Slip ons, because the newer bikes had a Catalytic Converter, which absorbs ~25% of the sound, so the newer pipes only reduce 75% of the sound.
(the newer bike slip ons are a great cheap update if you have a buddy who's bike you cannot even hear, just perfect so you can tell what gear he is in & what he plans to do next)
so when you consider that amount of sound increase, and then drill the end of the baffle, and then use a Head Pipe without a Cat, then you have a little bit more sound.
the hole saw is $10 at Lowes.
Also, the OEM mufflers I looked at had a Fiberglass blanket inside, which physically slides back & forth when you shake the pipe. this means the fiberglass will blow out & make the pipe a bit louder.
pic 829 & 841 show the fiberglass mat down in the body
so overall, several marginal gains that add up to a good sounding pipe for the cost of the hole saw on an Evo, and on a newer bike, buy a non-cat head pipe, drill the OEM slips, and you have a little bit of sound.
YMMV/hope this helps.
the 2014 pipes I had, only had the Clutch side like that. I have those on my bike now, and they are ALMOST perfect. (they are the "slash up" so I really like them)
however, the pipes off a 2015 FLHTKL had both pipes with the pinched baffle tube. They are "flat ends" so I have not tried them.
you can just slide a hole saw in there, and drill out the end of the tube.
it may only be 1 1/4 hole, but you should consider the newer than 2009 OEM slip on's are louder (flow more) than the old EVO and TwinCam Slip ons, because the newer bikes had a Catalytic Converter, which absorbs ~25% of the sound, so the newer pipes only reduce 75% of the sound.
(the newer bike slip ons are a great cheap update if you have a buddy who's bike you cannot even hear, just perfect so you can tell what gear he is in & what he plans to do next)
so when you consider that amount of sound increase, and then drill the end of the baffle, and then use a Head Pipe without a Cat, then you have a little bit more sound.
the hole saw is $10 at Lowes.
Also, the OEM mufflers I looked at had a Fiberglass blanket inside, which physically slides back & forth when you shake the pipe. this means the fiberglass will blow out & make the pipe a bit louder.
pic 829 & 841 show the fiberglass mat down in the body
so overall, several marginal gains that add up to a good sounding pipe for the cost of the hole saw on an Evo, and on a newer bike, buy a non-cat head pipe, drill the OEM slips, and you have a little bit of sound.
YMMV/hope this helps.
Thread Starter
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From: Jax FL
drilled out the gas side of a 2015 pipe on a 2007 Ultra today (96 inch with no other mods)
it sounds pretty dang good, like something aftermarket (it has a big mat/mesh pad inside the muffler body still)
the hard part was getting the baffle out, think about it before you do it.
maybe use a smaller bit to separate the two pieces, then a larger bit to make a bigger hole, so you can pull the parts out
I had to waggle the bit around to wallow out the hole so I could pull the piece out
it sounds pretty dang good, like something aftermarket (it has a big mat/mesh pad inside the muffler body still)
the hard part was getting the baffle out, think about it before you do it.
maybe use a smaller bit to separate the two pieces, then a larger bit to make a bigger hole, so you can pull the parts out
I had to waggle the bit around to wallow out the hole so I could pull the piece out
Last edited by 04ctd; May 24, 2017 at 08:38 PM.
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From: Jax FL
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