Fullsac MX Header pipe
Road Master
Joined: Jul 2013
Posts: 1,159
Likes: 322
From: Joplin, mo
All of this stuff about which exhaust, header or muffler is the best is a long ongoing test of who likes what. If it looks cool some like that. If it sounds cools others like that. Only way to really know is to take same bike under same conditions and keep trying all of them on a dyno.
On a motorcyle like you say when they move the x back 1 or 2 inches is that really enough to make a difference? The real truth is an open free flowing exhaust produces more HP. A restricted exhaust will produce more torque. This is an undisputed fact. With this x in the pipe it will create a more open exhaust with less back pressure. That is for sure.
I built pipes for Harley's, street rods, stock cars and dragters for years in the 70's. A bike i built some for was featured in the first issue of Easy Rider magazine in 71. That started a trend that lasted several years for me. At the time was working at Midas and ended buying my own bending machine and built hundreds of pipes for several years. I learnt a lot from that.We used to put drag pipes on a harley take a crayon draw a line down the pipe. Make a pass down the strip and where the crayon quit melting cut the pipe off. Whether that worked or not don't know but the riders all thought so. Didn't have a dyno back then.
I am not a sales person for any of the makers. But all of us have their own opinions. Some professional and some not. I am not one to judge anyone on that.
One thing i do know is these baggers we are riding today require torque cuz the bike is 900lbs plus two riders and gear. Unless you use the bagger for a bar hopper you'll want the torque higher than the horse. This is why everyone is wanting the cams that produce the higher numbers on the torque curve. They want it sooner and for it to stay longer.
On a motorcyle like you say when they move the x back 1 or 2 inches is that really enough to make a difference? The real truth is an open free flowing exhaust produces more HP. A restricted exhaust will produce more torque. This is an undisputed fact. With this x in the pipe it will create a more open exhaust with less back pressure. That is for sure.
I built pipes for Harley's, street rods, stock cars and dragters for years in the 70's. A bike i built some for was featured in the first issue of Easy Rider magazine in 71. That started a trend that lasted several years for me. At the time was working at Midas and ended buying my own bending machine and built hundreds of pipes for several years. I learnt a lot from that.We used to put drag pipes on a harley take a crayon draw a line down the pipe. Make a pass down the strip and where the crayon quit melting cut the pipe off. Whether that worked or not don't know but the riders all thought so. Didn't have a dyno back then.
I am not a sales person for any of the makers. But all of us have their own opinions. Some professional and some not. I am not one to judge anyone on that.
One thing i do know is these baggers we are riding today require torque cuz the bike is 900lbs plus two riders and gear. Unless you use the bagger for a bar hopper you'll want the torque higher than the horse. This is why everyone is wanting the cams that produce the higher numbers on the torque curve. They want it sooner and for it to stay longer.
Seasoned HDF Member
Joined: Jan 2008
Posts: 13,679
Likes: 11,472
From: State of Confusion
my recent experience taught me that tuning plays a huge role in torque as well..my Street Canons are much less restrictive than the OEM mufflers, and getting a great dyno tune using the SEPST increased torque and moved it lower in the rpm range significantly
Road Master
Joined: Jul 2013
Posts: 1,159
Likes: 322
From: Joplin, mo
You are absolutely correct. Tuning is needed on most all mods and makes all things come together.
HD EFI Guru
Joined: Jan 2008
Posts: 4,494
Likes: 4,781
All of this stuff about which exhaust, header or muffler is the best is a long ongoing test of who likes what. If it looks cool some like that. If it sounds cools others like that. Only way to really know is to take same bike under same conditions and keep trying all of them on a dyno.
Last edited by Steve Cole; Aug 20, 2017 at 08:32 PM.
Tourer
Joined: Mar 2017
Posts: 329
Likes: 101
From: On the Beach
So how does this header set up/ build compare the Rinehart Slimline Duals ?
Really interested to know if there is much of a difference or they are pretty similar.
I have been considering going with a different set up on my bike.. but may leave the slimline's and just change out my 4" slip ons to some 4.5"s
Really interested to know if there is much of a difference or they are pretty similar.
I have been considering going with a different set up on my bike.. but may leave the slimline's and just change out my 4" slip ons to some 4.5"s
Ultimate HDF Member
Joined: Oct 2016
Posts: 5,063
Likes: 2,582
From: On my bike!
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Joe Kucinski
Seasoned HDF Member
Joined: Nov 2016
Posts: 6,090
Likes: 6,451
From: East TN
I ordered the MX head pipe a month ago for my 17 CVO Street Glide. I held off installing on the bike until I saw what the 2018 CVO's were as I really wanted a road glide.
I just got my 18 CVO road glide, and in 3 weeks when I get home from work off shore will be installing it.
Several reasons I chose the MX. Most head pipes focus on bragging rights, high rpm HP. I don't ride there much. I tend to keep it under 4K rpm, and am mostly 2500 to 3500. This is where Steve George's Fullsac head pipe shines.
I will be doing a heavy breather fullsac MX head pipe, fullsac 2.25 baffles and a TTS tuner. I am sure it will be great. Power is my goal, not noise.
I have a 138.5 HP and 140 torque CVO road king, it is running a Fullac DX head pipe, 2.25 cores. Torque curve is very long and flat, a lot is due to head pipe design.
I just got my 18 CVO road glide, and in 3 weeks when I get home from work off shore will be installing it.
Several reasons I chose the MX. Most head pipes focus on bragging rights, high rpm HP. I don't ride there much. I tend to keep it under 4K rpm, and am mostly 2500 to 3500. This is where Steve George's Fullsac head pipe shines.
I will be doing a heavy breather fullsac MX head pipe, fullsac 2.25 baffles and a TTS tuner. I am sure it will be great. Power is my goal, not noise.
I have a 138.5 HP and 140 torque CVO road king, it is running a Fullac DX head pipe, 2.25 cores. Torque curve is very long and flat, a lot is due to head pipe design.
