Screamin' Eagle Nightstick 2-into-1 Slip-On Muffler

Part Number 64900220


Finish / Color: Jet Black



Tuned by the factory for the ultimate combination of rich tone and legal sound levels, this slip-on muffler is the perfect match for your Harley-Davidson® model. The high-flow design of the external diffusion discs produces plenty of low-end guts to get your bike away from the light, and a fat torque curve that gets you quickly around slow-moving traffic.

  • Multiple stainless steel diffusion discs and domed end cap deliver an aggressive raspy sound
  • Feature an embossed Screamin' Eagle® logo
  • Jet black finish
  • Easy to install
  • 50-State U.S. EPA compliant

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  • Model
  • These Screamin' Eagle® products are 50-State U.S. EPA compliant for sale and use on all applicable vehicles, including those that are pollution controlled. See Genuine Motor Parts and Accessories or Screamin' Eagle Accessories catalog for fitment information. Screamin' Eagle Performance products are intended for the experienced rider only.


There is no warranty on exhaust pipes and mufflers with regard to any discoloration. Blueing is caused by tuning characteristics, cam timing, carburetor jetting, over-heating, etc. and is not caused by defective manufacturing.

  • Material Content

  • Warranty

    1 year limited warranty – Go to for full details
  • Sold in Unit

  • In The Box

    Muffler only
Nightstick 2-into-1 Slip-On Muffler is rated 4.0 out of 5 by 3.
Rated 5 out of 5 by from Nice Sound! Apparently the Motor Company was holding back on this one. I have had several Screamin' Eagle pipes that would moderately change tone and still be street legal; however these definitely had a noticeable difference right from start up. And still being legal is surprising. Now you won't hear them well at interstate speeds but definitely while getting up to speed. That and I love the tunable exhaust look with the diffusion discs.
Date published: 2016-12-31
Rated 4 out of 5 by from Not too loud I have listened to several recordings of the sound produced by these pipes. In the end, I have decided to purchase mainly because of the name brand and the fact that they are 100% legal. I do not like very loud pipes. This pipe made my bike sound very nice and people always notice when I start the engine. It does have that specific Harley sound but without being obnoxious. If extremely loud and annoying sound is your thing, look elsewhere. If you want quality sound and a pipe that was specifically tuned for your bike, give this one a try. I have the full stage 1 set including the download and I am pretty happy with it. One thing though: it does pop on deceleration.
Date published: 2016-07-26
Rated 3 out of 5 by from It has great potential... This slip on is only marginally louder than the stocker for the 500. I never thought HD would be into using exhaust diffusers like the ones on this muffler. After removing them, it sounds great... actually, it sounds like a REAL HD.
Date published: 2014-07-20
  • y_2018, m_2, d_26, h_20
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  • clientName_harleydavidson

Why does the 17 and later street models require a calibration?

15 and 16 models don't so why does the later models do?
Asked by: justinstreet750

Is this made out of stainless steel?

Asked by: JD1988
Hey JD1988, The Nightstick mufflers are made out of steel. Thanks! Rockstar883
Answered by: Rockstar883
Date published: 2016-09-29

How does this product effect MPG? Speed? Sound?

Asked by: nmaple785


Does use of Screaming Eagle parts invalidate the factory warranty on the SG750, or any Harley?
Asked by: drgnswrd


The dealer that I go to had a SE slip-on installed on an XG 750 and it didn't sound much different than the stock pipe, except for the sound of the air passing through the diffusers. This didn't seem worth the $350 price tag. Your response to another question regarding this product was recommending not to remove the BAFFLE. However, there was a video on Youtube where a guy removed the DIFFUSERS and it sounded perfect. Does this in any way require any calibration of my engine?
Asked by: Ericthered74
Hi Ericthered74, The baffles are there for EPA compliance, if they are removed they will be out of that compliance. Since we haven't done any testing, or validated the removal of the baffles, we can't give out any info in regards to calibration.
Answered by: Rockstar883
Date published: 2016-03-11
  • y_2018, m_2, d_26, h_20CST
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    Prices listed are generally the Manufacturer's Suggested Retail Price (MSRP), excluding taxes and shipping. Prices at local dealerships may vary. All online orders will be fulfilled and shipped by
    Harley-Davidson Motor Company as the agent for the Selling Dealer.