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Mac

4-into-1 Chrome Megaphone Exhaust System - 001-0401

  • Part #:
    25647
  • Mfg Part #:
    001-0401
  • OEM/Ref#:
1 / 2

Mac

4-into-1 Chrome Megaphone Exhaust System - 001-0401

  • Part #:
    25647
  • Mfg Part #:
    001-0401
  • OEM/Ref#:
MSRP: $439.95

Price: $417.95 5% off!
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Mac 4-into-1 Chrome Megaphone Exhaust System - 001-0401
  • MAC is dedicated to building products that meet strict quality standards. They follow exacting guidelines during manufacturing in order to insure that you receive a quality, reliable product every time
  • Economical replacement systems for 69 thru late 80s in-line fours and Honda V-fours
  • High performance, lightweight and lots of ground clearance
  • Does not block centerstand, oil filter or drain plug access; and features removable baffles
  • Carburetor re-jetting may be desired for best performance


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

Installation of a new exhaust system may change your motorcycles fuel-air mixture. Please consult the exhaust manufacturer directly with questions regarding any modifications that may be made during, or after, installing their product. If a jet kit or Power Commander is recommended, see the Intake/Fuel section.

Exhaust discoloration (bluing) is caused by engine conditions such as cam timing, fuel-air mixture, operating temperature, etc. It is not the result of defective manufacturing, therefore is not covered by any warranty. See Chems/Lubes section for products to help remove or prevent exhaust discoloration.
Specifications
Part #: 25647
Mfg #: 001-0401
Color - Primary Chrome
Finish Chrome
Style Megaphone Muffler
Type 4-Into-1 System
Units Each
Weight 13.81 lbs
Alternate/OEM Part Number(s):
0010401
UPC Code:
879668000086
Fitment for Mac 4-into-1 Chrome Megaphone Exhaust System - 001-0401

Part 25647 fits the following machines

Honda
  • CB350F Super Sport 1972-1974
Reviews & Questions
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4.5 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
6
3
1
0
0
Finish
4.1 / 5
Fit
5.0 / 5
Performance
4.4 / 5
Loudness
Very Quiet
Average
Very Loud
Would you recommend this product?
Yes (1)
Finish
5 / 5
Performance
5 / 5
hard to find
thank you for having a 4 to 1 system. System is hard to find. looks great - sounds even better Thanks much
April 20, 2010
Finish
5 / 5
Performance
5 / 5
REALLY NICE PIPES!!!
these pipes are loud. even with baffle there loud. i'm planning to take it out but it kinda sounds good with it in there. it also has a wicked sound over 3500 rpm. I LOVE THEM
August 27, 2010
concord, CA
Finish
1 / 5
Performance
4 / 5
poor quality
Fit great on my kz650, bike runs better and feels a bit faster. Sounds a bit better too. Quality is awful though, welds began to rust a week after installation the first time they got some rain on them.
July 3, 2010
Finish
5 / 5
Performance
5 / 5
Great System
I bought this system for my 1983 CB650SC Nighthawk the other day and I just love it !! My bike runs so much better and looks great too.
May 16, 2010
Finish
3 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
4 / 5
Mac 4 into 1 for Honda CB 750K
Shipping was super fast! It was vary easy to install. One the old exhaust was off the new one was on in less than 15 minutes!
July 9, 2012
Finish
4 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
4 / 5
Overall really solid system
Installed on a '76 Honda CB550 and it went on fairly easy, and the finish does look really nice! Only gripes so far is that the center stand bracket didn't really work out. Which wasn't a huge problem because with the old 4 into 4 system gone it kinda looked out of place. Though on my bike it is easy to just slide it back on whenever I need to service it.The finish around the collector welds looks like it might flash rust if it were to get caught in some rain.

The sound of the exhaust is great though! Makes my old honda sound like a sport bike. It's definitely louder than stock on acceleration but usually mellows out at cruising speeds.

I'm pretty pleased with it overall, definitely cleaned up the look of the bike!
June 9, 2011
Finish
4 / 5
Performance
4 / 5
GS1100ESD
Fit was good. There was rubbing on the clamp against my center stand. Fixed it by clamping higher up on the muffler

Sound is loud. A little too loud for my taste. I'd prefer stock noise level.

Finish was almost perfect. Missed spots of chrome on welds.

Overall, a very good product. I really liked that the headers allow room for when performing an oil filter change.
February 27, 2012
Finish
5 / 5
Fit
5 / 5
Would you recommend this product?
Yes
350f project
the quality is excellent chrome is quality fit good project not completed so noise prefomance not known
August 13, 2017
Purchased
 over 2 years ago
Finish
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
4 / 5
Where's the Beef???
I really wanted a Performance Header that I could wrap and use any muffler I want. I can do that still. This muffler is a little whiney. Not Beefy! I'm gonna stick a Cherry Bomb on this Header!!! Very Shiny for sure! Nice upgrade. Still doing power/speed tests. I'm getting ready to Pod and Jet!

Had to lift the front of the engine to wiggle the tabs into place.
Not that hard to install. Yes, you can do it.
September 8, 2012
Hard to find parts
Thank you for having the parts for my 77 Honda 750 K.. I just bought this bike last month and it's in need of a lot of parts... I have been looking for day for the exhaust system, thank you for having it.. This will be my first purchase for fixing up my bike... Matt

P.S. I will let all my friends know of your site, this will save them a lot of time... Thank you....
December 15, 2009