Converting from 2-1 to 2-2 - 2010 SG
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Cruiser
Joined: Nov 2011
Posts: 207
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From: Little Elm, TX
Converting from 2-1 to 2-2 - 2010 SG
Well I have a 2010 SG with the 2-1 exhaust. As most prefer duals - so do I. That being said and being new to Harley's, what is the best option for the conversion for fit/finish/performance. I see in the drag specialties catalogues that there are numerous head pipes. Couldn't converting to an OEM 2-2 head pipe be just as easy? Is there a reason to use aftermarket over OEM?
So what's the 411 on head pipes and converting to duals?!
So what's the 411 on head pipes and converting to duals?!
Road Master
Joined: Jan 2008
Posts: 959
Likes: 5
From: Oswego, IL
Getting rid of the cat converter is the biggest reason......
But if you do the change and need a set of stock heat sheilds for the 2-1-2 system I have a set that is headed to ebay. PM me if intrested
But if you do the change and need a set of stock heat sheilds for the 2-1-2 system I have a set that is headed to ebay. PM me if intrested
Cruiser
Joined: Apr 2005
Posts: 234
Likes: 2
From: Midland NC
try your local dealer for takeoffs
My buddy changed his out and went to the local dealer and got brand new 2011 takeoffs for $100, no mufflers though, just headpipe and heat shields plus clamps. He had to get some clamps and brackets is all. Of course the mufflers you can get on line or ask for them too.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
options:
aftermarket- could be pricey ( and when I ride my Pal's Limited with the V&H power dual header, the cover on the X pipe hits hard!)
09 headers, they fit- no cat need adapters bungs for the o2 sensors
08 and earlier headers won't fit
10,11 headers fit, o2 sensors work--- but probably want to have the cat removed for performance reasons.
Look for take off sets at you local dealer/ performance shop and craigslist.
have the cat removed -if you want there is a tutorial on the forums with pics.
or leave the cat in and just bolt up.
You may end up needing/wanting to change mufflers as well. Endless options there- I like the supertrapps supermegs/S/E Nightstick style
oddball option, thunderheader used to sell just a dummy for the left side--- then I remember seeing dummies which had a trap door and were nifty for tool storage.
you could buy something or just mount up a dummy muffler--- the stock 2/1 in not a bad performance option.
mike
aftermarket- could be pricey ( and when I ride my Pal's Limited with the V&H power dual header, the cover on the X pipe hits hard!)
09 headers, they fit- no cat need adapters bungs for the o2 sensors
08 and earlier headers won't fit
10,11 headers fit, o2 sensors work--- but probably want to have the cat removed for performance reasons.
Look for take off sets at you local dealer/ performance shop and craigslist.
have the cat removed -if you want there is a tutorial on the forums with pics.
or leave the cat in and just bolt up.
You may end up needing/wanting to change mufflers as well. Endless options there- I like the supertrapps supermegs/S/E Nightstick style
oddball option, thunderheader used to sell just a dummy for the left side--- then I remember seeing dummies which had a trap door and were nifty for tool storage.
you could buy something or just mount up a dummy muffler--- the stock 2/1 in not a bad performance option.
mike
Last edited by mkguitar; Nov 29, 2011 at 01:34 PM.
Elite HDF Member
Joined: Apr 2006
Posts: 3,948
Likes: 54
From: The Burgh
Well I have a 2010 SG with the 2-1 exhaust. As most prefer duals - so do I. That being said and being new to Harley's, what is the best option for the conversion for fit/finish/performance. I see in the drag specialties catalogues that there are numerous head pipes. Couldn't converting to an OEM 2-2 head pipe be just as easy? Is there a reason to use aftermarket over OEM?
So what's the 411 on head pipes and converting to duals?!
So what's the 411 on head pipes and converting to duals?!
If you have a 2-1, want performance and like duals, then go for 2-1 system with a ghost pipe on the left. You won't lose any performance and you'll get a second muffler for looks. Or go 2-2 and you'll get looks, sound and heat reduction but you'll lose a little bit of performance.
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Cruiser
Joined: Nov 2011
Posts: 207
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From: Little Elm, TX
That's good to know. I think I kind of knew that or pieces of it but you filled in the blanks.
Thanks!
So my best bet is true duals or a full 2-1 system.
Thanks!
So my best bet is true duals or a full 2-1 system.
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The stock system in the newer bikes is technically a 2-1-2 system, but it's got a balance chamber, and not a true collector. Most good aftermarket exhaust systems will outperform the stock system, including a number of the better true dual exhaust systems. Run your exhaust into a 2-1 or 2-1-2 with a properly designed collector, and you will frequently pick up a little torque in the lower rpms, compared to a TD system. The amount of gain can be very slight, or fairly noticible, depending on a whole lot of things, like which cams are in the bike, and how well it's tuned. Your exhaust system and the cams in your motor function as a system, change one and you often impact the other.
Elite HDF Member
Joined: Apr 2006
Posts: 3,948
Likes: 54
From: The Burgh
I ditched my stock 2-1-2 headers for true duals (V&H Dresser Duals) because of heat. They didn't have a cat converter but they were roasting my right leg and my passenger right foot. As soon as I installed the true duals, the heat dropped significantly and the added benefit was the sound. My CFRs sounded darn good before but they sounded even better after. Not much louder but much more stereophonic, due to the fact that the 2 mufflers receive 50% each, vs. 70R and 30L with the stock headers.
If you're more into performance and looks than heat and sound, then 2-1 with a ghost muffler is the way to go, IMO.
Last edited by frenchbiker; Nov 29, 2011 at 03:45 PM.