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Thunderheader Black 2-into-1 Exhaust System

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Everyday Low Price: $725.99

Gold Club Price: What's This? The Gold Club is our premier membership program. For most items members receive 10% off every day, plus exclusive sales and benefits just for members. More Info $653.39

J&P Part: 441-139

Rating: Read Reviews

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This product was proudly made in the USA Made In The USA

Thunderheader Black 2-into-1 Exhaust System

• Patented Anti-Reversion design

• Produces maximum HP without sacrificing low end torque

• Complete with all hardware needed

• Heat shields sold separately

• Black

Product Specs

  • Complete Header Pipe: Complete System
  • Design: Anti-Reversion Design
  • Exhaust System: 2 Into 1
  • Finish: Black
  • Heat Shields Included: No
  • Manufacturer Part Number: 1057B
  • Material: 16-gauge steel
  • Sold in Units: Set


This product fits a variety of motorcycles. Please select yours so we can find the right part and guarantee fitment. Select A Motorcycle

Harley-Davidson® Models

Softail Convertible CVO FLSTSE : 2010
Softail Cross Bones FLSTSB : 2010–2011
Softail Custom FXSTC : 2007–2008, 2010
Softail Deluxe FLSTN : 2007–2008, 2010–2011
Softail Deuce FXSTD : 2007
Softail Fat Boy FLSTF : 2007–2008, 2010–2011
Softail Fat Boy Lo FLSTFB : 2010–2011
Softail Heritage Classic FLSTC : 2007–2008, 2010–2011
Softail Heritage Springer Classic FLSTSC : 2007
Softail Night Train FXSTB : 2007–2008
Softail Rocker C FXCWC : 2010
Softail Standard FXST : 2007–2008

Customer Reviews

 gijohnsfc Posted:

Great sound and looks!

 cdyoude Posted:

I have been running this ThunderHeader for roughly ten thousand miles so far. It looks great, sounds great, improves performance compared to other pipes I've run from idle to wide open. The only issue I see is the finish cause a week after I installed the pipe I noticed surface rust over pretty much the entire pipe. Tried ceramic high temp paint but that didn't work so I have a feeling this beautiful pipe is going to be hidden behind some header wrap before to long.

 LennyBurt Posted:

Great header! I'd say the best! Looks as good as it sounds too

 Dane b Posted:

great quailty exhaust, install a little hard due to needing to drain transmission in order to install mounting bracket.

 harleydraco Posted:

Runs great on my '99 electa glide. Not as loud as I had hoped and it was built up to be, but still a great performing system! In hindsight, I would have purchased Chrome instead though. Posted:

Bought these pipes on scrach and dent, BEST pipes I ever had! 91 FLHS wood W6 cam

 harleydraco Posted:

Purchased for my 99 Electra Glide and about a year later I'm ready for something different. The pipes installed easy enough (though you have to remove the tranny cover to install a new bracket). But the black version has had terrible color fading and honestly, this system has never quite produced the sound i'm looking for. The horsepower is fine, but I really want a beefy throaty sound. This system is more middle-of-the-road as far as sound goes. Only real downside is the black fading. I'll stick with Chrome from here on out.

 JohnOberhauser Posted:

Thunderheaders produce extra power, without question, and they sound great. The big downside to the black pipes is the's horrible and I strongly recommend powder-coating or repainting (with VHT) prior to installation. Discoloration is only part of the issue, a bigger part is the rust that comes from shoddy paint. Heat shield may hide it, but they don't stop the rust, and that will quicly lead to blown out pipes. I have another bike with these pipes and they've been powder-coated, and they're many years old with no problem.

 loganroadman Posted:

Unmatched torque. Perfectly engineered without the hassle of changing out discs. Sounds and looks amazing. Price is fantastic. All in all best pipes available.

 Wenaden Posted:

Great product. Was so pleased with the exhaust I purchased for my Dyna that I had to buy some for my Street Glide! Nothing sounds like a Thunderheader.

 cfh1960 Posted:

product is not gloss black, good match to my black denim paint. if you have a 88 or 96 inch motor this is what you need.

 897smith Posted:

now my bike sounds like a Harley!

 897smith Posted:

now my bike sounds like a Harley!

 Kevin2403 Posted:

These thunderheaders were just whatbi wanted. Deep, loud, thunderheader sound. I put them on a 13 road glide and install took less than 2 hours. Wouldn't change them for anything else. If you want to be heard, and have a good looking exhaust and added performanceget them and dont look back.

 JamiZ Posted:

Good exhaust

 tomclark Posted:

Put this pipe on my 2011 Road Glide. Not too difficult installing and love the sound and performance. I'm sure the black will burn off eventually but I can always touch up with hight temp paint. Had the chrome TH on my 2003 Heritage and loved it. I don't get the heat shields. You won't be disappointed with this exhaust system unless you're looking for show quality.

 ironwolf63 Posted:

Excellent piece of equipment. A vast improvement in the sound of my ride and no more burned legs for my passenger on that top pipe!

 Anzacron Posted:

Best fit for my bike and sounds great!

 lablover1028 Posted:

I absolutely love these pipes. They look great and my god do they sound good. Take note that if you are on the 103 that these pipes will be VERY hot. Not that other engines do not get hot but I have used these pipes on other engines and they didn’t throw off nearly as much heat. I would recommend getting the heat shields (sold separately).

Important Product Notes

Note: Please see U.S. EPA and your respective state and local regulations to confirm noise and emission compliance.

Important Exhaust Notes:

• Note: With any new exhaust, we recommend changes to carburetor jetting or use of an aftermarket fuel injection control module.

• There is no warranty on exhaust pipes and mufflers with regard to any discoloration. Blueing is caused by tuning characteristics, cam timing, carburetor jetting, overheating, etc. and is not caused by defective manufacturing. No refunds on exhaust pipes once motorcycle is started unless there’s a manufacturer’s defect.

• Flanges and retaining rings are not included with most aftermarket exhaust for 1984-2013 Evolution and Twin Cam models. Re-use your existing hardware, or purchase replacement hardware.

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