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[billhuntz]

I just completed a search and didn't find my answer.  I am having major difficulty finding part numbers on the HD website for head pipes.  I have a buddy who has a stock head pipe from a 2010 Street Glide that I am thinking of buying cheap.  I want to take it to the local muffler guy to have the cat removed. 

My question is, whether or not these pipes will fit my 2013 CVO Ultra? I like the idea if they will fit.  I am thinking the only real question is whether or not the O2 sensors moved between 2010 and 2013...

[blacktop]

I'm thinking about doing the same thing so would be interested in knowing this too.

[roadrunner]

Nice resource for checking OEM HD Parts;
http://www.shopronniesharleydavidson.com/OEMpartfinder.htm

[billhuntz]

Thanks for the link..Ronnie's site only goes to 2012 but the 2010 exhaust pipe part number is 66857-10.  The 2012 exhaust pipe part number is 66855-10A.  Not sure what the difference is if any...

[grc]

I just completed a search and didn't find my answer.  I am having major difficulty finding part numbers on the HD website for head pipes.  I have a buddy who has a stock head pipe from a 2010 Street Glide that I am thinking of buying cheap.  I want to take it to the local muffler guy to have the cat removed. 

My question is, whether or not these pipes will fit my 2013 CVO Ultra? I like the idea if they will fit.  I am thinking the only real question is whether or not the O2 sensors moved between 2010 and 2013...

The change to the type and location of the O₂ sensors came about for the 2010 model year, and hasn't changed since.  So a 2010 Touring headpipe will fit a 2010 through 2013.  As for the part number suffix change to -10A, that could signify any sort of a minor change that doesn't affect actual fitment, like a change to the catalyst perhaps.

You may want to do some more research on the subject of gutting the catalyst on a stock set of pipes versus buying an aftermarket replacement.  There are some concerns about the accuracy of the sensor data with gutted stock pipes, but I would assume if you know about the issue going in that you could fabricate something to address the issue.  I'm not an expert on this, just passing along the gist of what I've read on the subject.

Jerry

[mamacdonald]

2010 streetglide header was a 2 into 1 system......only had 1 muffler on the right side if I remember right

[grc]

2010 streetglide header was a 2 into 1 system......only had 1 muffler on the right side if I remember right

Excellent point.  I assumed he was talking about a FLHXSE, which has the same dual muffler setup as his CUSE8.  But as you noted, the 2010 regular FLHX came with a single muffler and no crossover pipe, so the header pipe didn't have a provision for that crossover connection and won't work with a dual muffler setup.   I often preach about not assuming, so of course I did it myself.

2010 FLHX header pipes - 66857-10
2010 FLHXSE header pipes - 66855-10

Jerry

[Buckeye_Tuning]

A 2010 will fit a 2013 bike, like GRC says.

I too would pass on the de cat, but... it is what it is....  if... you are trying to get rid of some heat.  If you think this is some type of performance gain... that will NOT happen.  Talking to Lonewolf the other day, and he states that a pipe WITH the cat will show a bit more on the dyno, than one without the cat.  I believe this to be true, BTW.

[FLSTFI Dave]

A 2010 will fit a 2013 bike, like GRC says.

I too would pass on the de cat, but... it is what it is....  if... you are trying to get rid of some heat.  If you think this is some type of performance gain... that will NOT happen.  Talking to Lonewolf the other day, and he states that a pipe WITH the cat will show a bit more on the dyno, than one without the cat.  I believe this to be true, BTW.

I would disagree, on more than one bike of mine, a Fullsac head pipe with no cat has shown both a torque and HP gain.  The cat restricts air flow, just like stock mufflers do.

I would agree, keeping stock mufflers and just removing the cat, would be no power gain.  However a head pipe with no cat and good mufflers will show a significant gain.

[05Train]

I would disagree, on more than one bike of mine, a Fullsac head pipe with no cat has shown both a torque and HP gain.  The cat restricts air flow, just like stock mufflers do.

I would agree, keeping stock mufflers and just removing the cat, would be no power gain.  However a head pipe with no cat and good mufflers will show a significant gain.

He's not talking about a Fullsac, he's talking about a stock headpipe with the converter removed.  One would hope that an engineered header would make more power than the stock one.  The converter itself is a metal honeycomb, not the old ceramic brick.  It presents no flow impediment at stock power levels.  It also helps keep the O2 sensors from reading from the wrong pipe (crosstalk).

[Fullsac Performance]

Lets look at a little History.
Way back in 2009, Harley sold about a zillion Touring models. Ok, maybe it was only a half zillion. Every single one of them with the exception of the CA models
and the 110 CVOs had a non cat factory headpipe. Now we are suggestion that all of these non cat stock Touring bikes had cross talk issues and made less power then the models with the cat headpipes? Getting you hands on a Factory OEM 96" non cat headpipe for your CVO was the first thing you did in 2009. I cut the cat out of the very first 2009 CVO that came in my shop after modding the mufflers and seen a solid 4 HP gain. Cross talk? The term hadn't even been invented yet and who even cared, the bikes ran perfect, got 42 MPG and made 96 HP and 114 TQ with 300.00 of work and a tune up. Thankfully, nothing has changed, its still a simple chromed out two wheeled farm tractor that just needs to breathe. Removing the cat from a stock headpipe is still a step in the right direction.

Steve

[05Train]

Lets look at a little History.
Way back in 2009, Harley sold about a zillion Touring models. Ok, maybe it was only a half zillion. Every single one of them with the exception of the CA models
and the 110 CVOs had a non cat factory headpipe. Now we are suggestion that all of these non cat stock Touring bikes had cross talk issues and made less power then the models with the cat headpipes? Getting you hands on a Factory OEM 96" non cat headpipe for your CVO was the first thing you did in 2009. I cut the cat out of the very first 2009 CVO that came in my shop after modding the mufflers and seen a solid 4 HP gain. Cross talk? The term hadn't even been invented yet and who even cared, the bikes ran perfect, got 42 MPG and made 96 HP and 114 TQ with 300.00 of work and a tune up. Thankfully, nothing has changed, its still a simple chromed out two wheeled farm tractor that just needs to breathe.

Steve

Correct me if I'm wrong Steve, but the O2 sensor location was at the exhaust ports in 2009, they moved to the collector in 2010.  Hence the difference.

[Fullsac Performance]

Correct me if I'm wrong Steve, but the O2 sensor location was at the exhaust ports in 2009, they moved to the collector in 2010.  Hence the difference.

100% correct, the 2009 headpipe is one year only with the 18mm 02s. All 2010 and later headpipes are identical with lower 12mm 02s as previously stated with the exception of the single exit 2010 FLX that was quickly dumped in 2011. Talk about a turd on the dyno!

Steve

[Buckeye_Tuning]

Well, let's see....  Fullsac sells a REAL pipe, right Steve?  That IS the one that I recommend to folks.

The cat material does NOT impede flow in a 100% stock pipe and performs BETTER than on with Cat material removed.  O2s work 'better, I suspect. 

A stock head pipe with cat works BETTER than someone we won't name (NOT Fullsac) pipe with NO cat.

This is all data driven by dyno numbers and not someone's simplified way of viewing thing OR adding new cans, which screws up HEADPIPE comparisons.

Most do NOT adhere to any sort of scientific comparisons, and simply go by 'what makes sense..."

End result is this...  unless one is poor (yeah right with a CVO bike), the gutting a cat pipe makes that pipe perform WORSE that before one gutted it.

Dave?  You really NEED to understand the English language better before you call me out.  I talked about STOCK pipes, NOT aftermarket pipes.  Crap Dude...  you treated me like an idiot.

[Fullsac Performance]

Well, let's see....  Fullsac sells a REAL pipe, right Steve?  That IS the one that I recommend to folks.

Thanks for your recommendation, I truly appreciate it!

Steve