The LCGP looks nice.  It’s kinda like an old school Britt bike muffler.  It was easy to install.

The weights are as follows:

Stock:                  14 lbs

Dyna:                  7 lbs

LCGP with baffle:      6 lbs

Mac:                          5 lbs

C-Bomb with baffle:      4 lbs

C-Bomb:                    3 lbs

Why am I not surprised that the stock muffler is a porker?

Sound quality:

Modified stock:  It sounds almost exactly like the stock muffler.  It’s a little lower frequency so it’s slightly less irritating.  Sounds a lot like a small industrial engine, like a pressure washer or a farm implement.  Not pleasant, not powerful, just sort of utilitarian.

Dyna:  It sounds much better than the stock muffler.  It obviously has some sort of wool packing in there because the grating high-frequency noise is filtered out.  It’s a nice sounding muffler with a nice tone.  Not like a V-Twin but much better than stock.
 
Note that in the past I have made negative comments about the Dyna, stating that it was too noisy.  I don’t know how I arrived at that conclusion.  Maybe I slipped it onto the stock header for a quick & dirty listen, possibly didn’t have a good seal between muffler & header.  For this test it was installed correctly, and the sound was good.
 
Mac (chrome):  In a word, obnoxious.  Emits an extremely loud, high-frequency snap, crackle, pop.  The absence of any wool packing is evident because every decibel of acoustic energy seems to escape this things grip.  While I am sure an open pipe would be louder, this thing will flat make you some enemies.  If you think other bikers will admire the manly music wafting from your exhaust tip, think again.  It’s all high-frequency cacophony and sounds anemic.  I hate it.

Mac (black): Similar to the C-Bomb.  Very powerful low-frequency sound but the volume is bone-crushing.  It is so loud I literally had to sneak out of my neighborhood and could not run the thing in the garage for any sort of tuning.  It is a good deep rumble and sports the sort of sound quality that most bikers are looking for, but the volume is simply too much.  Waaaaaaaay too much.  Please, don’t run this muffler without packing.  With ceramic wool packing it’s tolerable until you screw on the throttle.  Added 11/22/20.

C-Bomb:  Very powerful low-frequency sound but the volume is bone-crushing.  It is so loud I literally had to sneak out of my neighborhood and could not run the thing in the garage for any sort of tuning.  It is a good deep rumble and sports the sort of sound quality that most bikers are looking for, but the volume is simply too much.  Waaaaaaaay too much.  Please, don’t run this muffler without a baffle.

C-Bomb with Baffle:   Top notch sound quality.  Very nice low-frequency thud, thud, thud.  Deep, throaty, very pleasing, powerful note.  The combination of restriction, directional change, and absorption really does the trick.  Great sounding muffler.

LCGP with Baffle:    Didn’t even attempt to run this one without a baffle.  Same comments as the C-Bomb with baffle.  Very nice sounding muffler.  Both the 1.5" baffle and 1.75" baffle were very quiet and had a nice healthy sound, but the 1.75" baffle produced an even lower frequncy note.  Even more pleasing than the 1.5" baffle.
Both these setups are excellent.  

Aesthetics?  I’ll leave that up to you guys.  I think all the systems look good in the right application.  The stocker looks good on a sleeper.  The Dyna looks good on a cruiser.  The Mac looks good on a café.  The C-Bomb looks good on a bobber.  The LCGP looks good on an old school replica.

For me, the clear winner overall is the LCGP.  My goal is power and this one makes measurably more power without making a lot of racket.  It achieves a low level of restriction without a high level of noise.  It sounds good too.  I believe there’s more flow to be had.  That 2.5” glass-pack leaves enough room for a larger baffle tube (like 1.75” ID).  I think I can get the restriction down to levels that are lower than the Mac.  It would be great if I could come up with a muffler that pulls 16.5” H2O like the unbaffled C-Bomb, yet emits noise like the baffled LCGP.  Dream on you say?  Hey, ya gotta shoot for the stars, right?

I hope some of you find this report informative.  As always, I welcome your questions and comments.

Stay safe, stay well.

Mike  

Good Write up and testing.  A lot of folks just want their bike to sound faster, and don't really care if it actually is.

Several other forum members who have installed Mac mufflers, including their Slash Cut model agree it is too loud.  Any muffler you can see through is not going to be quiet!

I do hope the Cherrybomb results don't start a "loud fad" in the pursuit of performance - your engine is highly modified and needs to breath!

I wonder how well a SuperTrapp muffler would work on your bike?  (Not trying to get you to spend more money).  There was a SuperTrapp on my bike when I bought it - I took it off as it made too much noise for me.  When I ride down the street I wave to my neighbors and they wave back.......they have all 4 fingers up!

Maybe you could figure out a way to put a butterfly valve in the baffle tube.....and make it straight through and noisy when you need the power?

 

 

You can get an app for smartphones that serves as decimeter.
certainly your evaluation from quiet to loud is acceptable, but it would be nice to quantify it.

Are wildly inaccurate as a human ear?

I like the Mac header, but am unable to find a seller to supply just the header itself. I don't want their muffler.