Transform your Triumph 675 into a weapon with the revolutionary Stringer Stacks Variable Length Velocity Stacks!

Factory SuperBike and Stringer Race Station have joined forces to introduce the next big thing in sport bike performance technology. Get ready to revolutionize your riding experience with Stringer Race Station’s Variable Velocity Stacks – the go-to solution for all your power woes.

Sport bike riders know that there’s nothing worse than getting left behind on the race track or losing precious seconds on the open road. With Stringer Race Station’s Variable Velocity Stacks, you can unleash the full potential of your bike and blow away the competition.

We’ve put our stacks to the test for over 2 years with the world’s top racers, including the legendary Sylvain Guintoli, a Multi FIM World Superbike Champion with Yoshimura SERT Motul. The results speak for themselves: massive power gains and better throttle response across the entire RPM range.

Our stacks outperform all other aftermarket products, including full race homologated exhaust systems. Plus, they cost less than even the most affordable stainless steel system. It’s a win-win for any rider looking to dominate the competition and enhance their overall riding experience.

Don’t settle for less than the best. Upgrade to Stringer Race Station’s Variable Velocity Stacks and join the ranks of elite riders who demand the most from their machines. Order now and start experiencing the power and performance you deserve!


StringerStacks Variable Length Velocity Stacks are printed using 3D printer technology using a carbon fuel resistant filament and they are delivered as a complete replacement stack kit coupled with an electronic motor and CPU to lift the upper stacks at a set RPM. This approach allows us to create variable stacks like Yamaha, BMW, Ducati do from the showroom and allows us to create velocity stacks that increase power and throttle response at mid and high rpm, not only giving proven gains on the dyno chart below, but this doesn’t tell the whole story, in real-world use – where unlike on a dyno –  the ram air into the airbox is properly fed, thus getting horsepower and torque gains and throttle response that cannot otherwise be achieved with bike modifications at this price point.

StringerStacks are available for the following model bikes

  • Aprilia RS660
  • GSXR1000 K9-L6 2009-2016
  • GSXR1000 L7+ 2017-2022
  • GSXR600 2011+
  • MV Agusta F3 800
  • Yamaha MT10
  • Yamaha R7
  • Yamaha R6 06-07 2CO
  • ZX10R 2011-2015
  • ZX10R 2016-2020
  • ZX10R 2021+
  • ZX636 10-22
  • Ninja 400
  • CBR1000RR 2020+
  • CBR600 2007-2021
  • Triumph 675
  • Triumph 765