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Cobra 909 Twins Mufflers - 6303

  • Part #:
    4408542
  • Manufacturer Part #:
    6303

MSRP Price: $399.95

Our Price: $359.95

You Save:
$40.00 (10%)

Overview of Cobra 909 Twins Mufflers - 6303

The 4-inch diameter, 909-Twins feature a unique scalloped and smooth rolled outer tip that is matched with a scalloped inner tip. This "Twin" tip design gives an elegant look, especially because there are no visible outer screws securing the core. We use a 2.25-inch louvered core for its traditional and recognizable Harley sound. These mufflers carry our limited lifetime warranty too. Incredible styling, great sound, lifetime warranty. Tough to beat.



Included Items:

(2) Chrome mufflers (Left,Right)

(2) Exhaust clamps (27-61 MSC)

Instructions 

The Air Resources Board (ARB) does not permit the use of aftermarket emission-related parts that alter the air/fuel ratio of an emission-controlled vehicle. Due to these legal restrictions this part cannot be shipped to California.

Specs for Cobra 909 Twins Mufflers - 6303

Color - Primary Silver
Style Bologna/Slash-Cut Tip
Type Muffler/Silencer
Units Set
Weight 21.65 lbs

Cross reference number(s):

18010867

Specs for Cobra 909 Twins Mufflers - 6303

Color - Primary Silver
Style Bologna/Slash-Cut Tip
Type Muffler/Silencer
Units Set
Weight 21.65 lbs

Fitment for Cobra 909 Twins Mufflers - 6303

See if this part fits your ride

Part 4408542 fits the following machines

Harley-Davidson
  • 2011 Harley-Davidson Street Glide Trike - FLHXXX
  • 2010 Harley-Davidson Street Glide Trike - FLHXXX
  • 2018 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2017 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2016 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2015 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2014 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2013 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2012 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2011 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2010 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2009 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
5.0 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
6
0
0
0
0
Finish
5.0 / 5
Fit
5.0 / 5
Performance
4.6 / 5
Styling
5.0 / 5
Value
4.8 / 5
Loudness
Very Quiet
Average
Very Loud
Would you recommend this product?
Yes (5)
Finish
5 / 5
Fit
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
5 / 5
Value
5 / 5
Would you recommend this product?
Yes
A 2016 TRIGLIDE FROM VANDERVEST HARLEY IN GREEN BAY WI.
I PURCHASED A NEW 2016 TRIGLIDE FROM VANDERVEST HD IN GREEN BAY WI. THEY TOLD ME TO PURCHASE THE COBRA 909 EXHAUST FOR MY TRIGLIDE. GREAT FIT GREAT DEEP SOUND. GREAT PRICE.GREAT DEALERSHIP. KEN.
August 26, 2016
Finish
5 / 5
Fit
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
5 / 5
Value
5 / 5
Would you recommend this product?
Yes
Cobra slip on mufflers
I purchased these for my 16 TriGlide. I contacted Customer Support due to having some questions. They advised me that these were made specifically for the TriGlide. The installed in about an hour due to the stock muffler being difficult to remove. They are a little louder than I wanted but I"ll get use to the sound. Not as loud as the mufflers I had on my 08 Ultra. Overall I am pleased with the purchase. They look good and sound good. I have not heard any popping on decel so I'm hoping that I don't have to remap the system. Havent ridden enought miles to see if they affect the gas mileage. Will do update with and changes and photos later.
April 17, 2017
Finish
5 / 5
Fit
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
4 / 5
Styling
5 / 5
Value
4 / 5
Would you recommend this product?
Yes
Mufflers fot Tri Glide
Great look and sound, easy to install. Winter in MN so don't know about performance yet.
January 24, 2017
Purchased
11 months ago
Wife's trike
Bought theses for the wife's trike . Install new air cleaner and VH tuner and header trike sound bad Axx
June 12, 2017
Purchased
7 months ago
Loudness
Very Quiet
Average
Very Loud
Performance
4 / 5
Styling
5 / 5
Value
5 / 5
Would you recommend this product?
Yes
Look good easy install, sound great
Easy install sound good look great.
Easy install sound good look great.
August 12, 2017
Purchased
4 months ago
Finish
5 / 5
Fit
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
5 / 5
Value
5 / 5
Would you recommend this product?
Yes
Nice Street Low Rumble
The installation on my HD Trike took less than one hour. The sound was just what I wanted. The low rumble we all look for but rarely get. If anyone suggests to remove the baffles of your mufflers to make them louder - it will and your engine performance will suffer. The 909s gives you a louder low-end rumble that you & your neighbors can appreciate. Have someone record your first ride and then watch it. The sound is different when on the bike than when standing on the sidewalk. Cobra 909s are worth the investment.
The Slant Feature helps prevent scraping when entering a driveway.  Beautiful craftsmanship!
The Slant Feature helps prevent scraping when entering a driveway. Beautiful craftsmanship!
August 2, 2017
Purchased
4 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 2 questions Browse 2 questions and 3 answers
is this all I need to install these slip on mufflers on my trike?
larry on Aug 20, 2016
BEST ANSWER: I installed my 909s with the tires on. It takes longer, but you don't have to mess with the tires and re-torquing the lugs after 50 miles. I just lifted the rear-end, used jack stands and with the help of my new ratcheting box-end wrenches, everything came off quickly. I did the pipe clamp last to keep the slip-on steady.
Is fuel management needed with these mufflers?
Delton K on May 24, 2017
BEST ANSWER: I bought these for my 16 TriGlide. Easy to install. Customer service said I would not have to install a fuel mgr system. I have not noticed much popping on deceleration. The only time I hear popping is if I back off the throttle all the way from a higher RPM. They have a lower rumble than the stock mufflers. I really like the sound, and the wife even said they weren't to loud. Hasn't changed my MPG from stock mufflers. Still avg between 32-34 mpg.

Instructions and Manuals for Cobra 909 Twins Mufflers - 6303

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