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Feb 15, 2020 | 02:34 PM

plongson

Thread Starter

Road Master

Joined: Jun 2008

Posts: 1,151

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From: Southern Utah, USA

DeCat...

Damn, It's amazing these things can even breathe...Look at the restriction.

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Feb 15, 2020, 03:29 PM

Quik

Ultimate HDF Member

Joined: Oct 2016

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From: On my bike!

Stand by sir, the HD forums warranty police will be here shortly to explain the crime you've just committed and the ramifications.

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Feb 15, 2020 | 03:03 PM

Hoginedgewood

Stellar HDF Member

Joined: Jul 2017

Posts: 3,336

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From: Ky

Lots of folks with dynos say they flow well. I used a holesaw on an extension to drill mine out, and a piece of conduit to scrape the walls. I can weld but not as good as you.

Feb 15, 2020 | 03:29 PM

Quik

Ultimate HDF Member

Joined: Oct 2016

Posts: 5,063

Likes: 2,582

From: On my bike!

Stand by sir, the HD forums warranty police will be here shortly to explain the crime you've just committed and the ramifications.

Feb 15, 2020 | 03:45 PM

Rick17FLH

Cruiser

Joined: Jan 2018

Posts: 112

Likes: 31

From: western hemisphere

All engines need a measured amount of back pressure.

Feb 15, 2020 | 04:24 PM

squirrelsnest

Seasoned HDF Member

Joined: May 2016

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From: Alexandria, Va

Nice job removing that cat!

Feb 15, 2020 | 05:26 PM

smitty901

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Joined: Feb 2008

Posts: 22,999

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You would be surprised at how little effect it has. They flow pretty good. On a few I have removed the CAT of heat issues near the cat the sound did not really change nor did the bike run any different.

Feb 15, 2020 | 06:23 PM

mikes300

Stellar HDF Member

Joined: Apr 2007

Posts: 2,339

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From: Nor Cal

Quote:

Originally Posted by plongson

Damn, It's amazing these things can even breathe...Look at the restriction.

and yet the Dyno says otherwise

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Feb 15, 2020 | 07:01 PM

smitty901

Seasoned HDF Member

Joined: Feb 2008

Posts: 22,999

Likes: 11,439

Quote:

Originally Posted by Superdog3:16

The heat from the CAT can effect rider or passenger some but it don't make the bike run hotter. CAT creates heat to burn off gasses. No pulling the CAT makes no real difference in sound some may hear a little tone difference if they want to believe .
I am not against removing. The heat that comes off them can be a pain. The M8 has not been an issue so it is still in. No doubt a good header and pipes can make a little more power. if done right. It can also cause it to lose power in some cases .

Feb 15, 2020 | 07:03 PM

#10

plongson

Thread Starter

Road Master

Joined: Jun 2008

Posts: 1,151

Likes: 328

From: Southern Utah, USA

With all these enlightened comments about how awesome catalytic converters are and how much better they make our engines run, I'm sure it's only a matter of time before the custom pipe manufactures enlist our experts to incorporate CAT's into performance products...NASCAR, NHRA, They are next! I'm telling you, it's gonna happen! it will be a CAT revolution!