4.5" slip-on mufflers from S&S are the result of decades of riding, racing and tuning. Combining both, a stainless steel perforated core baffle with RaceTEX cartridge packing, they create a deep rumble and improved horsepower and torque, all while adding a unique look with styled aluminum end caps.
Stainless steel baffle with RaceTEX cartridge packing
Show quality finish
Dual muffler design bolts up to stock diameter head pipes with ease
Removable J2825 compliant dB reducers included
Sold in pairs
Made in the USA
Product Note:
Specification
Details
CARB Approved
Varies (make selection above)
Configuration
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Country of Origin
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Engine Type
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Exhaust Diameter
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Muffler End Cap
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Muffler Sleeve
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Warranty
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Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
Sound deep and not too loud. Always ran SS MK45 on my Harley touring bikes.
S&S MK45's look great! Easy to install.
By David B. on
These were easy to install on an '08 Touring bike and look great! Appear to be well made and have a nice design to them. The db reducers were easy to install and hopefully they quieten it down some compared to my old mufflers.
Haven't been able to see how they sound yet due to some other repairs I'm doing while I've got it on the lift.
S&S Mk45's Fall Just a Bit Short on the Volume
By James E. on
Verified Purchaser
I've now had the Mk45's on my 2011 Ultra for almost a year.
I can't say enough about the quality and the fit, but the sound is not what I was expecting.
It's very good and why I would rate it at least 4 Stars, but it's not as loud as what I was hoping for in a 4.5 Slip-on. Perhaps if I had after-market headers it would give me that real Harley rumble, but without them what I am hearing is a deeper and more robust sound only. Really not bad, but not 5 Stars.
S&S Mk45
By David B. on
Verified Purchaser
Great looking and sound awesome.
How many stars would you give this product? Write a review.
Will I need to have my 2020 FLHXS remapped after installing the S&S Mk45 4.5" Slip-On Mufflers?
By Anon.
Will I need to have my 2020 FLHXS remapped after installing the S&S Mk45 4.5" Slip-On Mufflers?
If you do not have any other performance modifications done to your bike, you should not need to have the bike tuned/mapped differently for the installation of these mufflers.
Verified Purchaser
