Removed the catalyst from the head pipes - Harley Davidson Forums



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Removed the catalyst from the head pipes

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Old 12-31-2010, 07:53 PM
rodzooka rodzooka is offline
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Default Removed the catalyst from the head pipes

My glacier thawed from my driveway enough that I could take advantage of the warm weather in MO today.Tried out the recently gutted head pipes. Sounds great! Seat of the pants tells me that there's more horse up on top now. I have a PCV,and Screamin Eagle breather with 4'' Rhineharts. I heard no pinging so I hope that a retune will not be necessary. I figure when I can ride more I will also check my mileage to see if it was affected. 2010 Ultra Classic
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Old 12-31-2010, 08:39 PM
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getting rid of the cat will sure enough open up the air flow, I bet you will like it!
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Old 01-01-2011, 01:36 AM
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You might notice a decrease in Fuel economy because the increase in power will make you ride harder and faster.
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Old 01-01-2011, 01:24 PM
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Plus make it run cooler.
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Old 01-01-2011, 01:47 PM
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Originally Posted by Ultra89Rider View Post
You might notice a decrease in Fuel economy because the increase in power will make you ride harder and faster.
That's funny! Everytime I do a performance upgrade my mileage goes way down for a couple of months also!!! Lol
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Old 01-01-2011, 01:56 PM
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That's part of my winter mod's. I picked up a head pipe from a member here. I friend of mine is going to cut, gut and weld for me.
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Old 01-01-2011, 04:21 PM
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Originally Posted by stewy1200c View Post
That's part of my winter mod's. I picked up a head pipe from a member here. I friend of mine is going to cut, gut and weld for me.

Glad to hear you got a head pipe Stewy! Have to let us know how it sounds...what slip ons you going to run with it?
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Old 01-08-2011, 10:29 AM
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I heard you can core the cat and not have to replace the head pipes. Has any one done that to increase the sound? I replace the stock with Screamming Eagles and it's only a little loader on acel. I have the 2011 Roadglide Ultra also.
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Old 01-08-2011, 02:42 PM
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been kicking around the thought of removing the cat , as design it does not seem like it would be a restriction in the exhaust, if it where a restriction Stage 1 on any bike with the cat would be ineffective as you would be unable to increase the are flow with the cat in place.
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Old 01-08-2011, 02:57 PM
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Originally Posted by Port Dawg View Post
Glad to hear you got a head pipe Stewy! Have to let us know how it sounds...what slip ons you going to run with it?
Port, I all ready have V&H twin slash rounds on the bike. I really like the sound now so with the cat out it should be even better.
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09, 2010, 2011, cat, catalyst, catalysts, classic, glide, harley, head, located, performance, pipe, remove, street, ultra

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