Save 35% when you back our kickstarter campaign...

Breathe new life into your favorite trumpet with our High Efficiency Valve Stems (HEVS) now available for Bach Stradivarius, Yamaha (all 4-digit model numbers), Schilke, Carol, and Harrelson (built after 2010). Experience improved efficiency resulting in more control and less effort. 

Features Include:
  • Will not degrade from galvanic corrosion (like aluminum stems)
  • Wider grip for easy installation and removal
  • Spring seat design to prevent valve spring noise
  • 35% more thread surface area (compared to OEM Bach)
  • Added inertia increases overall stability of standing wave

Early backers save - click here to get a set of Harrelson HEVS
Instrument prices will increase by 15% on January 1st, 2021
All instrument deposits are reduced to $1000 through 2020
"Great marketing never gives the buyer any reason to question the merits of the claim. In contrast, honest marketing invites you to learn how and why the claim is true and often gives you the resources to confirm this for yourself."  -Jason Harrelson

Meet the harrelson team