Grand National 2-2 System For HD Twin Cam® Dyna® Models

Inspired by their domination in the Flat Track space, S&S Cycle has taken exhaust for the venerable Dyna to the ultimate next level.

Leveraging a two into two format with a hidden crossover, the new Grand National system is designed for pure, relentless performance.

Clean bends, stainless header tubing and full shielding create an exhaust that makes real power without the punishment of melted boots and uneven torque delivery of most other short tract systems.
Look for systems to be available in the next few weeks. More at

Features & Benefits
• 2:2 Free-flow design equals solid Hp gains
• Hidden crossover provides performance benefits of 2:1
• Full heat shields on both front and rear headers
• Stainless steel header construction
• Race inspired Grand National end cap
• High Temp Ceramic Black Finish
• Oxygen sensor ports allow use of wide band or stock O2 sensors.
• Removable dB reducers included
• J2825 Sound Compliant”

5 Responses to “Grand National 2-2 System For HD Twin Cam® Dyna® Models”


  1. 1 BOSS HAWG Mar 27th, 2018 at 9:31 am

    I have a Dyna Low Rider for 1 of my rides, I’ll have to check these out to see if they are a best fit for me with additional performance enhancements. .

    Boss Hawg

  2. 2 Jeff Duval Mar 28th, 2018 at 6:54 am

    “Engineering with Flair” 🙂 !!!

  3. 3 Hdrider Mar 28th, 2018 at 7:00 am

    “Hidden crossover to provide benefits of 2-1”

    They are admitting that it’s not as good as a 2-1.

    Why don’t they just say it’s a new exhaust with perhaps some benefits over stock.

  4. 4 Excite bike Mar 28th, 2018 at 1:05 pm

    Hdrider they have dyno charts on the website if you click the link in the article. Looks like over 8 ft-lb and 8 hp increase over stock.

  5. 5 S&S Cycle Mar 28th, 2018 at 4:30 pm

    HDrider, we’re admitting it’s better!

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