Harley Davidson Forums

Milwaukee Eight (M8) 2017 and up M8 Air and Liquid Cooled discussion
Sponsored by:
Sponsored by:

Thunderheader

Thread Tools
 
Search this Thread
 
Old Jul 1, 2017 | 08:24 PM
Share
  #11  
dave the welder's Avatar
dave the welder
Road Captain
Joined: Jun 2017
Posts: 667
Likes: 175
From: North Port Florida
Default
I had TH's on a RG with 95" stage 3 motor, sounded good.
 
Reply
0
Old Jul 2, 2017 | 08:08 PM
Share
  #12  
HD_fan's Avatar
HD_fan
Road Warrior
10 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2015
Posts: 1,601
Likes: 679
From: San Francisco
Default
Here they are on my bike. TH slip-ons. Nice little pull 2:21 - 2:33 mark of the video. Love these M8 engines.

 
Last edited by HD_fan; Jul 2, 2017 at 08:13 PM.
Reply
0
Old Jul 2, 2017 | 09:43 PM
Share
  #13  
Blue Tick's Avatar
Blue Tick
Road Master
Joined: Jul 2015
Posts: 821
Likes: 54
From: Tomball, Tx.
Default
What vendors are selling them? Can you get them in black? Are you guys running the stock header with these or have you changed that out as well?
 
Reply
0
Old Jul 9, 2017 | 10:36 PM
Share
  #14  
Psycho Dave's Avatar
Psycho Dave
Cruiser
Joined: Jul 2006
Posts: 237
Likes: 29
From: NorCal
Default
Originally Posted by Blue Tick
What vendors are selling them? Can you get them in black? Are you guys running the stock header with these or have you changed that out as well?
http://m.ebay.com/itm/132048566422
 
Reply
0
Old Jul 10, 2017 | 09:16 PM
Share
  #15  
talkingrock's Avatar
talkingrock
Road Warrior
10 Year Member
Shutterbug
Liked
Loved
Joined: Mar 2016
Posts: 1,853
Likes: 515
From: georgia
Default th
Originally Posted by HD_fan
Here they are on my bike. TH slip-ons. Nice little pull 2:21 - 2:33 mark of the video. Love these M8 engines.

https://www.youtube.com/edit?o=U&video_id=zQ_yQWXXhrg
sounds good
 
Reply
0
Old Jul 10, 2017 | 09:31 PM
Share
  #16  
Quik's Avatar
Quik
Ultimate HDF Member
Joined: Oct 2016
Posts: 5,063
Likes: 2,582
From: On my bike!
Default
They look like a stock pipe with a bad weld job, they do sound pretty good though
 
Reply
0
Old Aug 11, 2017 | 12:56 PM
Share
  #17  
Blue Tick's Avatar
Blue Tick
Road Master
Joined: Jul 2015
Posts: 821
Likes: 54
From: Tomball, Tx.
Default
Originally Posted by HD_fan
Here they are on my bike. TH slip-ons. Nice little pull 2:21 - 2:33 mark of the video. Love these M8 engines.

https://www.youtube.com/edit?o=U&video_id=zQ_yQWXXhrg
Are you running an aftermarket headpipe? If so, is it and the slipons styled like HD did the '17 exhaust setup? Bigger on the right side?
 
Reply
0
Old Aug 11, 2017 | 04:40 PM
Share
  #18  
HD_fan's Avatar
HD_fan
Road Warrior
10 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2015
Posts: 1,601
Likes: 679
From: San Francisco
Default
I'm running Basani headpipe with Thunder header slip-ons. Right side bigger just like the stock unit.
 
Reply
0
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-1

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-3

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-4

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-5

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-6

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-7

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-8

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
story-9

The Best and Worst Harley-Davidson Moves of 2025

 Verdad Gallardo
Old Aug 11, 2017 | 06:53 PM
Share
  #19  
Blue Tick's Avatar
Blue Tick
Road Master
Joined: Jul 2015
Posts: 821
Likes: 54
From: Tomball, Tx.
Default
Originally Posted by HD_fan
I'm running Basani headpipe with Thunder header slip-ons. Right side bigger just like the stock unit.
Is the Bassani a true dual head pipe or is there and x to it? Currently, I'm running a cobra pro chamber which is more h collector style. I'm looking to get a little better performance from vs the neighbor haters I have right now.
 
Reply
0
Old Aug 11, 2017 | 09:54 PM
Share
  #20  
HD_fan's Avatar
HD_fan
Road Warrior
10 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2015
Posts: 1,601
Likes: 679
From: San Francisco
Default
This is the head pipe I'm running.

https://www.revzilla.com/motorcycle/...y-touring-2017

It is almost exactly like the original head pipe but without the catalytic converter. It actually calls for using the stock heat shields...which I am running.

I your Cobras have no converter I doubt you will gain anymore performance on a stage 1.

I love me some Thunderheaders though! 2:20 to 2;35 of my video clip. It pulls hard!!
 
Last edited by HD_fan; Aug 11, 2017 at 09:58 PM.
Reply
0



Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 07:53 AM.

story-0
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-1
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-2
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-3
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-4
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-5
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-6
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-7
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE
story-8
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE
story-9
The Best and Worst Harley-Davidson Moves of 2025

Slideshow: A clear-eyed look at what actually worked for Harley this year, and what quietly undermined its progress.

By Verdad Gallardo | 2025-12-29 17:10:48


VIEW MORE