Thunderheader modi

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Feb 7, 2017 | 10:13 AM

#11

billib1954

Road Master

Joined: Nov 2013

Posts: 1,239

Likes: 356

From: virginia

I removed cat on my fatbob with rush slip ons, didn't cost anything. It was louder and lost torque at low end. replaced with supertrapp and sold the header. I wouldn't do it again. (remove cat)

Feb 7, 2017 | 10:14 AM

#12

Nickd2689

Stellar HDF Member

Joined: Feb 2016

Posts: 2,066

Likes: 259

From: Northstreet, michigan

Quote:

Originally Posted by cggorman

I've never played with a bike with emissions systems, but I know on a car the cat does reduce volume and mellow the tone. It's a noticeable difference.

this is what I would be concerned with, more so if you ever want to trade your bike in. It seems like they really have a hard on for HD lately (which is ****ed up considering the fuel mileage we get). I'd rather pay an exhaust company than the epa but that's just me. I'd leave it alone.

Last edited by Nickd2689; Feb 7, 2017 at 10:17 AM.

Feb 8, 2017 | 06:59 AM

#13

DynaRider8907

6th Gear

Joined: Jan 2017

Posts: 13

Likes: 0

From: Findlay Ohio

Quote:

Originally Posted by 1968aj

I have a 2014 switchback with a thunder header slip on. I still have the factory headpipe with cat intact. I like the sound of the thunderheader but I want it louder. local shop tells me they have decatted header pipes but it doesn't make it much louder.ANY SUGGESTIONS??

I went full thunderheader on mine. It seemed quiet at first, but after it had a few miles, the tone, and volume increased. It seems pretty quiet until I really rip on it. The guys behind me claim it's pretty snappy. It became pretty barky between gears as well. I definitely don't want another pipe I'm very happy. Also since the end of the pipe is under the bags, I wonder if maybe that's not a little dampening to you.

Feb 8, 2017 | 08:09 AM

#14

cggorman

Extreme HDF Member

Joined: Jun 2014

Posts: 11,448

Likes: 2,299

From: NW Ohio

Quote:

Originally Posted by Nickd2689

That's certainly a valid concern.

Feb 8, 2017 | 08:28 AM

#15

1968aj

Thread Starter

Cruiser

Joined: Oct 2009

Posts: 155

Likes: 2

From: southeast texas

thanks to all those with helpful advice. I can only assume nobody has or it is not possible to alter the slipon.I still like the sound of the thunderheader for the price I paid.

Feb 9, 2017 | 11:30 AM

#16

rydercheers

Tourer

Joined: May 2012

Posts: 251

Likes: 25

From: Avoca

Up the compression or get some different cams it'll change the tone completely. I have a full thunderheader on my 02 Low Rider and thought it was too quiet until I got some cams put in and changed it significantly.

Feb 9, 2017 | 11:56 AM

#17

Nickd2689

Stellar HDF Member

Joined: Feb 2016

Posts: 2,066

Likes: 259

From: Northstreet, michigan

Quote:

Originally Posted by rydercheers

i agree 100%. I just did my se117 and the se 259 cams came with it. I loved my fatcat before the upgrade, but man with the extra 7 ci and se cams, it ****in screams way better. Cams will definitely make a difference.