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Cobra PowerPro HP 2 into 1 Exhaust System - 6420

  • Part #:
    4400239
  • Manufacturer Part #:
    6420

MSRP Price: $608.95

Our Price: $548.06

You Save:
$60.89 (10%)
2 on Hand

Overview of Cobra PowerPro HP 2 into 1 Exhaust System - 6420

  • Same as the original PowerPro but with a new cylindrical muffler body along with the megaphone style
  • A chromed 3.5 in. muffler body with a delicately machined chromed billet tip adds looks to any bike
  • Internal cooling technology keeps a perfect non-bluing muffler body looking great
  • Full-length heat shield
  • Double-wall body
  • Removable Baffle

Included Items:
(2) Front/rear exhaust head pipes
(2) Front/rear exhaust heat shields
(1) Collector heat shield
(1) Muffler
(1) Exhaust bracket
(5) Heat shield clamps
(2) Head pipe clamps
(1) Muffler clamp
(2) 5/16-18 x .63 Hex bolts
(2) 3/8 x.75 Hex bolts
(1) 3/8-16 x 2.5 Screw
(1) 1/2-20 x 3.0 Screw
(1) Short spacer
(1) Long spacer

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

NOTE: Installation of a new exhaust system my 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 FUEL/INTAKE

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, carb jetting, overheating, etc., and is not caused by defective manufacturing. See CHEMS/LUBES section for products that will help prevent or remove blueing.

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 PowerPro HP 2 into 1 Exhaust System - 6420

Color - Primary Chrome
Finish Chrome
Style Straight-Cut Tip
Type 2-Into-1 System
Units Each
Weight 25.25 lbs

Cross reference number(s):

18000204

Specs for Cobra PowerPro HP 2 into 1 Exhaust System - 6420

Color - Primary Chrome
Finish Chrome
Style Straight-Cut Tip
Type 2-Into-1 System
Units Each
Weight 25.25 lbs

Fitment for Cobra PowerPro HP 2 into 1 Exhaust System - 6420

See if this part fits your ride

Part 4400239 fits the following machines

Harley-Davidson
  • 2006 Harley-Davidson Heritage Softail - FLST
  • 1990 Harley-Davidson Heritage Softail - FLST
  • 1989 Harley-Davidson Heritage Softail - FLST
  • 1988 Harley-Davidson Heritage Softail - FLST
  • 1987 Harley-Davidson Heritage Softail - FLST
  • 1986 Harley-Davidson Heritage Softail - FLST
  • 2006 Harley-Davidson Heritage Softail Classic - FLSTC
  • 2005 Harley-Davidson Heritage Softail Classic - FLSTC
  • 2004 Harley-Davidson Heritage Softail Classic - FLSTC
  • 2003 Harley-Davidson Heritage Softail Classic - FLSTC
  • 2002 Harley-Davidson Heritage Softail Classic - FLSTC
  • 2001 Harley-Davidson Heritage Softail Classic - FLSTC
  • 2000 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1999 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1998 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1997 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1996 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1995 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1994 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1993 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1992 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1991 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1990 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1989 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1988 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1987 Harley-Davidson Heritage Softail Classic - FLSTC
  • 2006 Harley-Davidson Heritage Softail Classic Injected - FLSTC I
  • 2005 Harley-Davidson Heritage Softail Classic Injected - FLSTC I
  • 2004 Harley-Davidson Heritage Softail Classic Injected - FLSTC I
  • 2003 Harley-Davidson Heritage Softail Classic Injected - FLSTC I
  • 2002 Harley-Davidson Heritage Softail Classic Injected - FLSTC I
  • 2001 Harley-Davidson Heritage Softail Classic Injected - FLSTC I
  • 2006 Harley-Davidson Heritage Softail Injected - FLST I
  • 1993 Harley-Davidson Heritage Softail Nostalgia - FLSTN
  • 1996 Harley-Davidson Heritage Softail Special - FLSTN
  • 1995 Harley-Davidson Heritage Softail Special - FLSTN
  • 1994 Harley-Davidson Heritage Softail Special - FLSTN
  • 2003 Harley-Davidson Heritage Softail Springer - FLSTS
  • 2002 Harley-Davidson Heritage Softail Springer - FLSTS
  • 2001 Harley-Davidson Heritage Softail Springer - FLSTS
  • 2000 Harley-Davidson Heritage Softail Springer - FLSTS
  • 1999 Harley-Davidson Heritage Softail Springer - FLSTS
  • 1998 Harley-Davidson Heritage Softail Springer - FLSTS
  • 1997 Harley-Davidson Heritage Softail Springer - FLSTS
  • 2003 Harley-Davidson Heritage Softail Springer Injected - FLSTS I
  • 2002 Harley-Davidson Heritage Softail Springer Injected - FLSTS I
  • 2001 Harley-Davidson Heritage Softail Springer Injected - FLSTS I
  • 1993 Harley-Davidson Softail - FXST
  • 1992 Harley-Davidson Softail - FXST
  • 1991 Harley-Davidson Softail - FXST
  • 1990 Harley-Davidson Softail - FXST
  • 1989 Harley-Davidson Softail - FXST
  • 1988 Harley-Davidson Softail - FXST
  • 1987 Harley-Davidson Softail - FXST
  • 1986 Harley-Davidson Softail - FXST
  • 1999 Harley-Davidson Softail Custom - FXSTC
  • 1998 Harley-Davidson Softail Custom - FXSTC
  • 1997 Harley-Davidson Softail Custom - FXSTC
  • 1996 Harley-Davidson Softail Custom - FXSTC
  • 1995 Harley-Davidson Softail Custom - FXSTC
  • 1994 Harley-Davidson Softail Custom - FXSTC
  • 1993 Harley-Davidson Softail Custom - FXSTC
  • 1992 Harley-Davidson Softail Custom - FXSTC
  • 1991 Harley-Davidson Softail Custom - FXSTC
  • 1990 Harley-Davidson Softail Custom - FXSTC
  • 1989 Harley-Davidson Softail Custom - FXSTC
  • 1988 Harley-Davidson Softail Custom - FXSTC
  • 1987 Harley-Davidson Softail Custom - FXSTC
  • 1986 Harley-Davidson Softail Custom - FXSTC
  • 2006 Harley-Davidson Softail Deluxe - FLSTN
  • 2005 Harley-Davidson Softail Deluxe - FLSTN
  • 2006 Harley-Davidson Softail Deluxe Injected - FLSTN I
  • 2005 Harley-Davidson Softail Deluxe Injected - FLSTN I
  • 2006 Harley-Davidson Softail Deuce - FXSTD
  • 2005 Harley-Davidson Softail Deuce - FXSTD
  • 2004 Harley-Davidson Softail Deuce - FXSTD
  • 2003 Harley-Davidson Softail Deuce - FXSTD
  • 2002 Harley-Davidson Softail Deuce - FXSTD
  • 2001 Harley-Davidson Softail Deuce - FXSTD
  • 2000 Harley-Davidson Softail Deuce - FXSTD
  • 2006 Harley-Davidson Softail Deuce Injected - FXSTD I
  • 2005 Harley-Davidson Softail Deuce Injected - FXSTD I
  • 2004 Harley-Davidson Softail Deuce Injected - FXSTD I
  • 2003 Harley-Davidson Softail Deuce Injected - FXSTD I
  • 2002 Harley-Davidson Softail Deuce Injected - FXSTD I
  • 2001 Harley-Davidson Softail Deuce Injected - FXSTD I
  • 2006 Harley-Davidson Softail Fat Boy - FLSTF
  • 2005 Harley-Davidson Softail Fat Boy - FLSTF
  • 2004 Harley-Davidson Softail Fat Boy - FLSTF
  • 2003 Harley-Davidson Softail Fat Boy - FLSTF
  • 2002 Harley-Davidson Softail Fat Boy - FLSTF
  • 2001 Harley-Davidson Softail Fat Boy - FLSTF
  • 2000 Harley-Davidson Softail Fat Boy - FLSTF
  • 1999 Harley-Davidson Softail Fat Boy - FLSTF
  • 1998 Harley-Davidson Softail Fat Boy - FLSTF
  • 1997 Harley-Davidson Softail Fat Boy - FLSTF
  • 1996 Harley-Davidson Softail Fat Boy - FLSTF
  • 1995 Harley-Davidson Softail Fat Boy - FLSTF
  • 1994 Harley-Davidson Softail Fat Boy - FLSTF
  • 1993 Harley-Davidson Softail Fat Boy - FLSTF
  • 1992 Harley-Davidson Softail Fat Boy - FLSTF
  • 1991 Harley-Davidson Softail Fat Boy - FLSTF
  • 1990 Harley-Davidson Softail Fat Boy - FLSTF
  • 2006 Harley-Davidson Softail Fat Boy Injected - FLSTF I
  • 2005 Harley-Davidson Softail Fat Boy Injected - FLSTF I
  • 2004 Harley-Davidson Softail Fat Boy Injected - FLSTF I
  • 2003 Harley-Davidson Softail Fat Boy Injected - FLSTF I
  • 2002 Harley-Davidson Softail Fat Boy Injected - FLSTF I
  • 2001 Harley-Davidson Softail Fat Boy Injected - FLSTF I
  • 2006 Harley-Davidson Softail Night Train - FXSTB
  • 2005 Harley-Davidson Softail Night Train - FXSTB
  • 2004 Harley-Davidson Softail Night Train - FXSTB
  • 2003 Harley-Davidson Softail Night Train - FXSTB
  • 2002 Harley-Davidson Softail Night Train - FXSTB
  • 2001 Harley-Davidson Softail Night Train - FXSTB
  • 2000 Harley-Davidson Softail Night Train - FXSTB
  • 1999 Harley-Davidson Softail Night Train - FXSTB
  • 2006 Harley-Davidson Softail Night Train Injected - FXSTB I
  • 2005 Harley-Davidson Softail Night Train Injected - FXSTB I
  • 2004 Harley-Davidson Softail Night Train Injected - FXSTB I
  • 2003 Harley-Davidson Softail Night Train Injected - FXSTB I
  • 2002 Harley-Davidson Softail Night Train Injected - FXSTB I
  • 2001 Harley-Davidson Softail Night Train Injected - FXSTB I
  • 2006 Harley-Davidson Softail Springer - FXSTS
  • 2005 Harley-Davidson Softail Springer - FXSTS
  • 2004 Harley-Davidson Softail Springer - FXSTS
  • 2003 Harley-Davidson Softail Springer - FXSTS
  • 2002 Harley-Davidson Softail Springer - FXSTS
  • 2001 Harley-Davidson Softail Springer - FXSTS
  • 2000 Harley-Davidson Softail Springer - FXSTS
  • 1999 Harley-Davidson Softail Springer - FXSTS
  • 1998 Harley-Davidson Softail Springer - FXSTS
  • 1997 Harley-Davidson Softail Springer - FXSTS
  • 1996 Harley-Davidson Softail Springer - FXSTS
  • 1995 Harley-Davidson Softail Springer - FXSTS
  • 1994 Harley-Davidson Softail Springer - FXSTS
  • 1993 Harley-Davidson Softail Springer - FXSTS
  • 1992 Harley-Davidson Softail Springer - FXSTS
  • 1991 Harley-Davidson Softail Springer - FXSTS
  • 1990 Harley-Davidson Softail Springer - FXSTS
  • 1989 Harley-Davidson Softail Springer - FXSTS
  • 1988 Harley-Davidson Softail Springer - FXSTS
  • 1997 Harley-Davidson Softail Springer Bad Boy - FXSTSB
  • 1996 Harley-Davidson Softail Springer Bad Boy - FXSTSB
  • 1995 Harley-Davidson Softail Springer Bad Boy - FXSTSB
  • 2006 Harley-Davidson Softail Springer Classic - FLSTSC
  • 2005 Harley-Davidson Softail Springer Classic - FLSTSC
  • 2006 Harley-Davidson Softail Springer Classic Injected - FLSTSC I
  • 2005 Harley-Davidson Softail Springer Classic Injected - FLSTSC I
  • 2006 Harley-Davidson Softail Springer Injected - FXSTS I
  • 2005 Harley-Davidson Softail Springer Injected - FXSTS I
  • 2004 Harley-Davidson Softail Springer Injected - FXSTS I
  • 2003 Harley-Davidson Softail Springer Injected - FXSTS I
  • 2002 Harley-Davidson Softail Springer Injected - FXSTS I
  • 2001 Harley-Davidson Softail Springer Injected - FXSTS I
  • 2006 Harley-Davidson Softail Standard - FXST
  • 2005 Harley-Davidson Softail Standard - FXST
  • 2004 Harley-Davidson Softail Standard - FXST
  • 2003 Harley-Davidson Softail Standard - FXST
  • 2002 Harley-Davidson Softail Standard - FXST
  • 2001 Harley-Davidson Softail Standard - FXST
  • 2000 Harley-Davidson Softail Standard - FXST
  • 1999 Harley-Davidson Softail Standard - FXST
  • 2006 Harley-Davidson Softail Standard Injected - FXST I
  • 2005 Harley-Davidson Softail Standard Injected - FXST I
  • 2004 Harley-Davidson Softail Standard Injected - FXST I
  • 2003 Harley-Davidson Softail Standard Injected - FXST I
  • 2002 Harley-Davidson Softail Standard Injected - FXST I
  • 2001 Harley-Davidson Softail Standard Injected - FXST I
4.4 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
6
2
2
0
0
Finish
4.4 / 5
Performance
4.6 / 5
Loudness
Very Quiet
Average
Very Loud
Finish
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Great Exhaust
Fit perfect on My 99 FatBoy. It increased my HP by 5. The price did'nt hurt either..
October 23, 2009
Finish
5 / 5
Performance
4 / 5
My Cobra Package
Recently installed the PowerPro HP 2into1 exhaust, FI2000R02 fuel module, and PowerFlo Air intake on my 2011 Dyna FXDC, all made by Cobra. DennisKirk made ordering, shipping, and delivery too easy. Everything arrived safely and on schedule. I'm no mechanic or genius but I will say all 3 components were very easy to install, the instructions were easy to read, and in about three hours total I was firing up the bike for a test ride. After a 20mi ride, everything worked great, I like the new sound even though it isn't ridiculously loud, the bike responds and breaths better, and I am going up another 10mph before I have to shift up to the next gear. The change and improvement in performance and sound are real, as proven by the before and after videos I took. I also like the look of a Dyna with a 2into1 exhaust, and the air intake looks high speed, very nice chrome finish. Flawless!
February 25, 2011
Finish
2 / 5
Performance
4 / 5
Louder than expected
The quality and fit of the pipes and heat shields were great. The muffler on the other hand was hard to slip over the ends of the pipes. I had to use a block of wood and beat it to get it far enough on the pipes and I still think it should've been on a little further. It was just a fraction of a millimeter past the gap where the clamps tighten the muffler end to the pipes. Then where the muffler bolted to the saddle bag frame I had to bring the bracket in so much for the mounting bolt holes to line up. Then the muffler bracket rubbed on the saddle bag frame because the muffler being so far down you couldn't center the rubber isolation pad. With much frustration, adjustment and tweaking I was able to get it bolted together but with the muffler bracket against the saddle bag frame. I wondered about how Cobra expected the muffler to fit if it would slide over the pipe end far enough and still not be back far enough to bolt on the saddle bag frame. I could've slide the muffler back but then the pipes wouldn't even be far enough in to the muffler to keep an opening at the clamp end split. The splits on the muffler for the clamps to tighten the muffler around the pipes.!?!? After I was finished I stood back and looked. I thought the system looked real nice. I cranked it up and was a bit disappointed with how loud it was. I know most people buy exhaust systems for Harleys to hear them. But this is a touring Harley and I like quiet. This is just a bit loud for me. I think most Harley riders would probably like the sound. It does sound good in a hi-performance sort of way. But to me Harleys aren't hi-performance motorcycles especially my Tour Glide. On the good side I did see a gain in performance. It pulls a lot stronger and with less pops and backfires. It seems to start easier too. Rolling the throttle on in 5th I was able to hit 100 mph much quicker. With the stock pipes it seemed to take forever if it ever got there. Ther may be a quieter baffle I could use. Oh, where the baffle bolts to the muffler. I was where the chrome plating was coming off. This will probably be a place where rust ill start. Good thing Cobra warrants the muffler against rust.
November 4, 2010
Finish
5 / 5
Performance
5 / 5
Very nice!!
Installation was fairly easy and the system has a very clean look to it.
The Dennis Kirk return policy was excellent after I had an issue with another name brand system I ordered first.
I've known of Cobra and the excellent product they make so I also went with the Hi-Pro Air cleaner they make, all quality products. I believe these pipes are loud enough without removing the baffles and really did improve the HP.
June 6, 2012
Finish
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Should've done it years ago
These were the easiest pipes I have ever put on my 97 Ultraclassic and they sound awesome and create great back pressure. It has made my after market cam come alive and it's like riding a new bike.
August 26, 2012
Finish
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
PowerPro Exhaust
Great fit and finish, gave me the look and performance I was after.
December 9, 2012
Finish
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
No Review Title Entered By User
No Review Text Entered By User
February 21, 2010
Finish
5 / 5
Performance
4 / 5
No Review Title Entered By User
great 2 into 1 at a reasonable price
June 4, 2015
Finish
4 / 5
Performance
4 / 5
2003 FLHTC
The Cobra Power Pro 2 into 1 was very easy to install. They have a deep sound to them and which is not tooo loud my neighbor like how they sound at 5am. The bike gain about 7hp
October 11, 2011
Finish
3 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
No Review Title Entered By User
No Review Text Entered By User
August 10, 2011
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Instructions and Manuals for Cobra PowerPro HP 2 into 1 Exhaust System - 6420

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