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National Cycle Peacemakers Slip-On Mufflers

This product fits a variety of motorcycles. Please select yours so we can find the right part and guarantee fitment. Select A Motorcycle

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J&P Part: 441-651

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Important warranty information: Warranty Information

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Instructions 441-651.pdf

This product was proudly made in the USA Made In The USA

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National Cycle Peacemakers Slip-On Mufflers

• Imagine starting your Harley for an early morning ride without angering your neighbors and enjoying a deep powerful exhaust note without cringing whenever you pass a police officer or school zone

• Switch back and forth between quieter and louder while you ride using a handlebar-mounted switch

• Slip-on system mounts to stock Harley-Davidson head pipes and muffler mounts

• Uses patented Aerobaffle technology, a National Cycle exclusive

• All stainless steel removable core, free from rust and corrosion

• Re-packable core

• Accepts all OEM heat shields

• Gains of up to 7 peak horsepower over stock in louder mode

• Compatible with all other National Cycle accessories, including Cruiseliner saddlebags and chrome lower deflectors

• Compatible with most Harley-Davidson accessories, including lowers for Touring models and most highway bars

• One-year manufacturer’s warranty

Product Specs

  • Baffles Included: Yes
  • Exhaust System: Dual
  • Finish: Chrome
  • Header Pipe Diameter: 1-3/4″
  • Heat Shields Included: No
  • Manufacturer Part Number: N41402
  • Material: 16-gauge Steel
  • Sold in Units: Set
  • Style: Slip-On


This product fits a variety of motorcycles. Please select yours so we can find the right part and guarantee fitment. Select A Motorcycle

Harley-Davidson® Models

Touring Electra Glide Classic EFI FLHTCI : 1996–2006
Touring Electra Glide Classic FLHTC : 1995–2005, 2007–2008
Touring Electra Glide Police EFI FLHPEI : 2006
Touring Electra Glide Police EFI FLHTPI : 2005–2006
Touring Electra Glide Standard EFI FLHTI : 2003–2006
Touring Electra Glide Standard FLHT : 1995–2008
Touring Electra Glide Ultra Classic EFI FLHTCUI : 1995–2006
Touring Electra Glide Ultra Classic FLHTCU : 1995–1998, 2005, 2007–2008
Touring Road Glide EFI FLTRI : 1998–2006
Touring Road Glide FLTR : 1998–2001, 2007–2008
Touring Road King Classic EFI FLHRCI : 1998–2006
Touring Road King Classic FLHRC : 2007–2008
Touring Road King Custom EFI FLHRSI : 2004–2006
Touring Road King Custom FLHRS : 2004–2007
Touring Road King EFI FLHRI : 1996–2006
Touring Road King FLHR : 1995–2005, 2008
Touring Road King Police CA EFI FLHPEI : 2005
Touring Road King Police EFI FLHPI : 2005–2006
Touring Street Glide EFI FLHXI : 2006
Touring Street Glide FLHX : 2006–2008
Touring Tour Glide Ultra Classic EFI FLTCUI : 1996
Touring Tour Glide Ultra Classic FLTCU : 1995

Customer Reviews

 tkotch Posted:

With all the new laws coming out about motorcycles that are too loud, I really like the idea of these pipes. But I had a few problems with my pair. Right after you have them installed they're great. Fun to play with. If you're leaving early from your apartment complex it's great to have in quiet mode. Then, after you're out on the freeway you can just flip it over to loud mode and have at it. I have no complaints of the sound when in loud mode. They sounded great. Unfortunately, there were 2 main problems I had with these pipes. First, I got caught out in a rainstorm when I was going cross country last year. I noticed after these got wet, the ends of the controller cables started to rust almost immediately. Eventually, after using them for just over a year the electric motor stripped a bolt and they wouldn't move between modes anymore. The second thing I didn't like about them, is there is an electric controller. You have to tap into the cables underneath the seat to get it working. It's a little bit of an intrusive install. I eventually ended up getting a pair of V&H after this experiment. Like I said, I really liked the option of having a stealth mode. But I wish it was controlled by a hand or foot lever. Something that didn't require you tap into the electric system. If you are out riding, you usually only need the quite mode for a small part of the ride. And always want to switch over to the loud mode for more performance. Like I said, I found it best for sneaking out of my apartment complex at 5AM without ticking off all my neighbors that are sleeping in.

 razazee Posted:

I installed the Peace Maker exhaust system in an afternoon, taking my time to get it right. The clamp to hold the drive moter cylinder to the frame was too large for the frame. I installed a rubber gasket between the frame and clamps to secure it. Sound with full baffle on is great - same as stock pipes. Sound with open pipes was a little disappointing. I thought it would be louder. MPG at 48. Overall rating-satified with my purchase.

 nelghannani Posted:

Great product, I own a Roadstar Midnight Silverado and these slip-ons fitsjust perfectly, with the baffles on they are quieter than stock but with them off they are pretty loud. They are worth the price for the option of two pipes in one. I recommend them.

Important Product Notes

Note: Please see U.S. EPA and your respective state and local regulations to confirm noise and emission compliance.

Important Exhaust Notes:

• Note: With any new exhaust, we recommend changes to carburetor jetting or use of an aftermarket fuel injection control module.

• There is no warranty on exhaust pipes and mufflers with regard to any discoloration. Blueing is caused by tuning characteristics, cam timing, carburetor jetting, overheating, etc. and is not caused by defective manufacturing. No refunds on exhaust pipes once motorcycle is started unless there’s a manufacturer’s defect.

• Flanges and retaining rings are not included with most aftermarket exhaust for 1984-2013 Evolution and Twin Cam models. Re-use your existing hardware, or purchase replacement hardware.

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