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Supertrapp

2 1/2 in. Inlet Universal Aluminum External Disc Muffler - 422-25000

  • Part #:
    43950
  • Mfg Part #:
    422-25000
  • OEM/Ref#:
1 / 2

Supertrapp

2 1/2 in. Inlet Universal Aluminum External Disc Muffler - 422-25000

  • Part #:
    43950
  • Mfg Part #:
    422-25000
  • OEM/Ref#:
MSRP: $295.00

Price: $265.46 10% off!
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Supertrapp 2 1/2 in. Inlet Universal Aluminum External Disc Muffler - 422-25000
  • Aluminum body universal muffler includes all items shown, including eight 4 in. diffuser discs, closed end cap, re-packable baffle core and a weld-on mounting tab
  • Approximately 13 in. long tip-to-tip without discs or end cap
  • 2 1/2 in. inlet size



NOTE: Not all products are legal for sale or use on pollution controlled vehicles. Check your local laws and the manufacturers information

NOTE: There is no warranty on exhaust pipes and mufflers with regard to any discoloration. Discoloration (blueing) is the result of tuning characteristics, cam timing, carburetor jetting, overheating, etc., and is not caused by defective manufacturing. See the CHEMS/LUBES section for products that will help prevent or remove blueing.

NOTE: Installation of a new exhaust system may change your motorcycles fuel-air mixture requirements. Please consult the exhaust manufacturer directly with questions regarding any modifications that may need to be made during. or after, installing their product. If a jet kit or fuel processor is recommended, see the FUEL/INTAKE section
Specifications
Part #: 43950
Mfg #: 422-25000
Color - Primary Silver
Style Canister Muffler
Type Slip-On/Muffler
Units Each
Weight 4.50 lbs
Alternate/OEM Part Number(s):
4MCU2500
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Reviews & Questions
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Can this muffler be fitted to a 2-1/8" diameter mid-pipe, or is there and adapter to fit it to one?
Kalpesh P on Jul 22, 2018
BEST ANSWER: 2 1/2 in. inlet size
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4.8 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
5
1
0
0
0
Finish
4.7 / 5
Performance
4.8 / 5
Loudness
Very Quiet
Average
Very Loud
Finish
4 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Supertrapp Universal Muffler
Good quality. I like the fact that this muffler can be repacked. The weld on tab was good because you can move the tab to wherever that you need it. This muffler has a very deep tone to it. In fact the only thing that I didn't like about the muffler is the aluminum outside body. It will be a pain to keep the oxidation off of it.
January 23, 2010
Texarkana, AR
Finish
5 / 5
Performance
5 / 5
A++++. Performs as advertised
Pros: Exhaust flow adjustable to your jetting/EFI. Or you can open or close it up and rejet/EFI MAP between greater fuel efficiency and maximum torque and horsepower. On my ZX-9r I rejetted 2% richer, resulting in about 3% better power throughout powerband, crisp throttle response and a 4-9% decrease in fuel consumption. Will fit just about any motorcycle or car application (see inlet diameter). Excellent choice for multiple elevation traveling.
Sound level: adjustable from quiet to BLOW-TORCH ROAR
Cons: requires aluminum TIG weld for motorcycle rear set mount ~$30
For video search YouTube: ZX-9r SuperTrapp
October 2, 2009
Finish
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
good product; well made
It is exactly what it says it is. Tune-able sound - jetting required for best performance.
March 14, 2011
Finish
5 / 5
Performance
5 / 5
Exhaust engineering excellence
Easy to follow instructions, easy to tune, and actually results in more power and more fuel efficient combustion. Expect about 3% more torque & horsepower and about 4% - 9% better fuel efficiency if tuned correctly. On my older 899cc 4-cylinder Kawasaki ZX-9r I run 8-9 discs. The new liter bikes don't get far away and when they're on vapors, I'm just getting started. And there isn't another exhaust that will match its performance for runs between low and high altitude. The Supertrapp keeps the jetting right in its sweet spot all the way up to 9,000,' without leaning the balance way out at sea level. The new kids say Supertrapp is old school. I say bring a lunch, cause I'll be putting on a school. A++++

Cons: requires TIG welding ~$30
September 2, 2009
Finish
5 / 5
Performance
5 / 5
Auxiliary muffler
Purchased this to supplement existing muffler on a Lotus 7. It does the job. Good quality product.
March 29, 2012
Finish
4 / 5
Performance
4 / 5
great muffler for vintage sound
Needed a muffler for a old enduro thumper. Did not want a new style muffler for it otherwise it would look like something its not. The supertrapp is a great look and vintage sound. All the dimensions labeled on Dennis Kirk are spot on for being a universal muffler. Everything was packed great no damage and shipping was very fast with no hassle.
July 21, 2015