I currently have FuelMoto's air cleaner and a Power Vision tuner installed on my 2011 Road King Classic. However, I've been having a difficult time selecting slip-ons to finish off a Stage 1 mod. I do plan to keep my stock head pipe (with cat).

As far as sound, I like a really deep tone and don't want pipes that are too much louder than stock. I've narrowed my choice to the V&H Monster Rounds and the SuperTrapp 4" Stouts.

I've read many positive comments for each of these slip-ons. However, there have been numerous complaints about the poor quality of chrome on the V&H pipes. I have also seen a couple negative comments about the quality of Kerker pipes, which I'm assuming are made by the same outfit that makes the SuperTrapp pipes.

Does anyone know which of these slip-ons can yield better performance numbers after a proper tune?

FuelMoto charges about $50 more for the SuperTrapp slip-ons than the V&H so price is very close.

Are there any other slip-ons that are on the quiet side, but will yield some decent performance gains that I should be considering?

 

You will have better sound with the V&H, as far as deeper and lower. The SuperTrapps are more raspy. The Fuel Moto Jackpot is what I run and is the lowest, deepest sound I've found.

 

I doubt you're going to see any appreciable hp difference in slip-ons, especially with the stock head pipe. And even with a difference in performance, it's probably 1-3hp at the most so I would go with whichever one you like the most and don't worry about hp.

Anyway, I have the monster rounds and love them. They are HEAVY too. AND, rather quiet, but IF you do want them a little louder, you can pull out the baffle, unwrap and remove the fiberglass wrap, and reinstall them.

 

Go Monster! Some folks dislike them saying the y are not loud enuogh, but over time they will break in and sound much better. I have around 5000K on mine and they sound much better (deeper and louder) than when first installed. They even sound better after warming up.

 

And no chrome issues as mentioned above. I hear they tend to peel off the tips, as these are aluminum instead of steel like the rest of the unit. I would suggest buying the black tips to avoid this issue. Mine are starting to bubble slightly on the tips. I figure on having them powder coated when they start to look bad. Maybe even blue to match bike.

 

I have MRs and have been pleased with them so far. Not nearly so loud as some slip-ons, but they are a good compromise for deepness without becoming annoying to "she who must be obeyed" when you twist the wick, like my old Longshots. No signs of chrome issues so far, with a little over 5K on the clock. I like how they look vs. alternatives. Can't speak to the Super Trapps, tho.

 

Go with the monster Rounds. Have them for about 5K like the others.
Only chrome issue I have is my fault. Backed one of the tips over a curb. Little chip in the chrome that you can't see from above. Hasn't spread in 4K miles.

 

I had Supertrapps on my SG at first and when I upgraded to the RG, I went with the Monster Rounds because after riding behind my bike for the first time with the Trapps, I realized it was REALLY too quiet. I like the Monster Rounds, a little bit louder, but not obnoxious. If you want close to stock, then the Supertrapps. If you want a little bit more than that quiet, then Monsters are a great option. Good luck!

 

Monster Rounds are great, I love mine. If you ride with others they will appreciate it. Loud enough and if you really want to get on them they sound great.