Dyna Exhaust for 125-145HP Build

[motolocopat]

Dyna Exhaust for a 125=145HP build
Bike is Dyna Fatbob, so light enough that I'm not to worried about a soft bottom end, just don't want any big dips and I'm not one to ride real low RPMs although good parking lot manners are always nice.
Ideally for a Exhaust that will work on a 110" with a little head work but not hold back a 124" to much if I end up there down the road. A middle of the road 117"/120" is a distinct possibility.
Plan on occasionally spinning it to 6250RPM, a S&S 640 cam wise or similar.

This will be a Back Road & Bar Bike setup mostly but once a year or so could be pressed into service for 3 day trip to Daytona/Sturgis so Sound wise, I'd prefer something that I'd be able to ride all day without having a droning in my ears at end of day. Not a determining factor, but a factor.

Considering

Supertrapp 827-71574 2:1 SuperMeg
V&H Pro Pipe  (might limit the 124"?)
Vance & Hines Stainless Hi-Output 2-into-1 (Too Much Pipe for a 110"?)
D&D is local, I like the BobCat looks but don't think it will work on bigger inch.
FuelMoto E-Series.
Bassani . . . There long list is confusing . . . but look to have some good options

[Don D]

Consider a boarzilla

[98fxstc]

I'm curious about the Bobcat.
I'm sure I read on the D&D site a while back they were not rated for greater than 103"
I think they have been modified now for the M8's and there does not appear to be a designated limit for them.

[98fxstc]

I have the FatcCat with the big bore baffle on my 09 dyna
good for 130hp but I do have a small dip down low
I would prefer it to any of the others you have mentioned

like Don says, the Boarzilla is a good bet

[motolocopat]

OK, I'm officially considering the Boarzilla.

Comments on others or my comments?

[boooby1744]

RB Spyder. Lots of options,you might have to lower your gearing a tad.

[FXDBI]

Love my E-Pipe on my 110 lots of bark when u really get on it proven to support 150hp. Best part for me is I live in Edmonton and it passes the noise tests. Sounds nasty in the upper RPM range.   Bob

[Hillside Motorcycle]

Proved it twice this spring to clients on large cube builds, that a D&D Borezilla works so well.
A pipe that DOES NOT work however, is a side-dump Python....better used under a bathroom sink.

[C-Cat]

Check out SPF, get s pipe built to your specs

[prodrag1320]

borezilla

[dynabagger]

My Boarzilla made the power you're looking for but is incredibly loud. Switched to a SPF which is much tamer sounding and feels close seat of the pants but haven't dyno'd since the change so can't say for sure.

[aabikrman]

RB Spyder. Lots of options,you might have to lower your gearing a tad.

I agree. I've used the RB Spyder and the RB Black  Hole.  The Spyder on a 120" build and the Blackhole on a 124".  The Blackhole is noticeably quieter with negligible power loss.  Both pipes are good, no flat spots, easy to tune and the craftsmanship is impeccable.  I like the Boarzilla's too but my gawd,,,,,,the noise.... !!!!

[jmorton10]

I don't know how anybody can stand the noise of the Borzilla LOL!!

I borrowed one from a buddy & tried it on my 124. It ran great, but I took it off a week later wondering if I would ever hear right again.......

~John

[Nastytls]

Simple solution. Earplugs.

[N-gin]

I had a boarzilla on my 107. No dip
I have a sheet some where. I can pm if you like.

But it was heavy. On a dyna you want a light pipe. Lots of sway with a heavy pipe for rubber mount engine. Yes you feel it at speeds.

[speedzter]

I don't find the Boarzilla overly loud.
Not as bad as some of the V&H systems out there.
The Muffler sure is heavy though !!

[Ozbob]

Boarzilla, no other of the shelf pipe comes close

[dave brode]

'99 FXDL, 4.125" x 4.4" with TW9Bs did not like a Propipe at all. Huge rich dip from apx 2300 to 3500. Tried different homemade baffles, a reverse cone inside, etc. Nothing worked. Huge stand-off cloud in the rich dip.

Very little dip with a Boarzilla. The 'zilla gained 5 horse and 4 lbs peak. Probably 20 lbs better in the dip.

No longer made, but KW 2" tapered muffler 2 into 2s worked very well. Looked like stock pipes at a glance. Peaks were a little higher on horse and a little less torque vs the 'zilla, but actually, nicer, fatter curve shape than the 'zilla. Admiral Akbar has that KW exhaust now, but I doubt that he'd sell it.
Dave 

[N-gin]

Where you located?
I have Borezilla you can try. It was on my Fatbob 09.

I'm 30205

[turboprop]

Dyna Exhaust for a 125=145HP build
Bike is Dyna Fatbob, so light enough that I'm not to worried about a soft bottom end, just don't want any big dips and I'm not one to ride real low RPMs although good parking lot manners are always nice.
Ideally for a Exhaust that will work on a 110" with a little head work but not hold back a 124" to much if I end up there down the road. A middle of the road 117"/120" is a distinct possibility.
Plan on occasionally spinning it to 6250RPM, a S&S 640 cam wise or similar.

This will be a Back Road & Bar Bike setup mostly but once a year or so could be pressed into service for 3 day trip to Daytona/Sturgis so Sound wise, I'd prefer something that I'd be able to ride all day without having a droning in my ears at end of day. Not a determining factor, but a factor.

Considering

Supertrapp 827-71574 2:1 SuperMeg
V&H Pro Pipe  (might limit the 124"?)
Vance & Hines Stainless Hi-Output 2-into-1 (Too Much Pipe for a 110"?)
D&D is local, I like the BobCat looks but don't think it will work on bigger inch.
FuelMoto E-Series.
Bassani . . . There long list is confusing . . . but look to have some good options

Make a pipe or have one made by a local race shop. Source the pieces from Burns, have them spec it based on your engine stuff. Why screw around with the off the shelf stuff?

[Nastytls]

I don't find the Boarzilla overly loud.
Not as bad as some of the V&H systems out there.
The Muffler sure is heavy though !!

It's not as loud as the bagger boarzilla. I can't hear mine over my buddies bagger riding next to or in front of me.
If budget is no consideration surely a custom pipe built to your builds spec's  would be best.

[itsafatboy]

I run the dyna boarzilla on a fatboy , ( fits better than the softail version around oil tank)  I have the quiet baffle but its not quiet by any means might help with some of the rasp but I really like the pipe ,  I also like the fuelmoto e-series they have for a dyna just haven't seen one up close .  I would like to try the e-seris muffler on the DD header but hard to find just the muffler,

[biggzed]

I run the dyna boarzilla on a fatboy , ( fits better than the softail version around oil tank)  I have the quiet baffle but its not quiet by any means might help with some of the rasp but I really like the pipe ,  I also like the fuelmoto e-series they have for a dyna just haven't seen one up close .  I would like to try the e-seris muffler on the DD header but hard to find just the muffler,

There was a member here many years ago that mounted a universal Supertrapp muffler to a Boarzilla head pipe. It slipped right on. Only fabrication was welding a mounting plate for the muffler bracket, but this was on a bagger. So not sure how a dyna pipe is supported, but surely something could be done. That pipe supported a 124" making 140+ hp/tq.



Zach