Decatt vs FM headers no o2 sensors
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Road Warrior
Joined: May 2012
Posts: 1,570
Likes: 117
From: Southeast NC
Decatt vs FM headers no o2 sensors
I have a FM Micro tuner on my 13 ultra with FM Pro touring muffs and a big ness AC. Some folks say the decatted stock headers mess with the o2 sensors but i am not using them. With the Micro tuner you disconnect the o2 sensors. So will it be ok to use a stock decatted header or spend the 400 to 500 on a FM header. Looking for a little less heat and little better throttle response. I cant understand how these bikes even run with that potato shoved into the header pipe.
Seasoned HDF Member
Joined: Dec 2004
Posts: 7,934
Likes: 43
From: Bloomfield, NM
I have a 2013 with a decatted head pipe and Fuel Moto Power Commander V. Do not have the 02 sensors connected. The bike runs fine as does the wife's TriGlide with the same setup.
Fuel Moto used to have a Dyno run comparing their head pipe to a 2009 stock(no Cat) and there was 1/8 HP difference. Definitely not enough gain to justify the price.
Bill
Fuel Moto used to have a Dyno run comparing their head pipe to a 2009 stock(no Cat) and there was 1/8 HP difference. Definitely not enough gain to justify the price.
Bill
Road Master
Joined: Jun 2014
Posts: 1,219
Likes: 63
From: westland Michigan
I have a FM Micro tuner on my 13 ultra with FM Pro touring muffs and a big ness AC. Some folks say the decatted stock headers mess with the o2 sensors but i am not using them. With the Micro tuner you disconnect the o2 sensors. So will it be ok to use a stock decatted header or spend the 400 to 500 on a FM header. Looking for a little less heat and little better throttle response. I cant understand how these bikes even run with that potato shoved into the header pipe.
Batman
Seasoned HDF Member
Joined: Jan 2007
Posts: 20,616
Likes: 4,440
From: anacoco, la
I have a 2013 with a decatted head pipe and Fuel Moto Power Commander V. Do not have the 02 sensors connected. The bike runs fine as does the wife's TriGlide with the same setup.
Fuel Moto used to have a Dyno run comparing their head pipe to a 2009 stock(no Cat) and there was 1/8 HP difference. Definitely not enough gain to justify the price.
Bill
Fuel Moto used to have a Dyno run comparing their head pipe to a 2009 stock(no Cat) and there was 1/8 HP difference. Definitely not enough gain to justify the price.
Bill
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Seasoned HDF Member
Joined: Sep 2008
Posts: 14,162
Likes: 11,252
From: San Diego, CA
FWIW..
I know it's counterintuitive, but that honey comb CAT doesn't cause as severe a restriction as most people think. I believe the muffler/baffle affect the performance & tune more than the CAT.
Case in point. I talked with FuelMoto about a tune for my cams/exhaust combo. I was running non OEM cams & mufflers, but still had the OEM headpipe. I told them I would eventually be getting their headpipe, just couldn't afford it right then. I was told they would send me the tune that would be real close. He mentioned that when I get their headpipe, I wouldn't need to retune....
I autotuned the tune they sent with the OEM headpipe. It averaged a 4% change with just a few cells approaching a double digit change.
When I eventually got their headpipe, I did a few more auto tune sessions. The average change was 3% with only one or two cells over 5%.
The tune didn't change much between the OEM headpipe and their headpipe. Their headpipe, however, is a work of art. With the loss of the cat AND the ceramic coating, it did affect the heat quite a bit.... not sorry I got their headpipe.
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