Customer Service (503) 832-7336
The Only Place For People Who Ride


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Free standard shipping on orders over $149
We ship to the lower 48 United States. Orders over $149 ship free; a flat rate applies under $149. Estimated delivery dates are shown at checkout based on item availability and the shipping option you choose.
We text or call to confirm sizing & fitment before we ship.
Every Factory SuperBike order includes a free expert check from real riders. Before we ship helmets and gear, we text or call to confirm your size and fit; for parts, we verify fitment to your bike. This is why we don't have to guess and you don't have to gamble.
Helmet & gear orders: reply to our text to confirm and your order ships, typically same day. No reply within 48 hours and we'll call you. Questions now? Call or text (503) 832-7336.
Your Honda CBR-600 (2011-2025) is one of the most "air box" restricted bikes on the market, are you tired of your friends beating you? Here is your solution to redeeming yourself and stunning people. You'll enjoy every shocked look with pure Honda pride. with our next-level Stringer Stacks. Designed for riders who want the best, these variable velocity stacks provide smooth predictable power gains and enhanced acceleration, ensuring your bike performs when you want it to and like you wished it would.
Factory SuperBike and Stringer Race Station have partnered to develop these Variable Velocity Stacks, a game-changing advancement in sport bike technology. With substantial power gains across the entire RPM range, these stacks outperform traditional static stacks.
Key Features:
World Level racers in series like British Superbike have reported noticeable improvements of over 11hp gains, with massive midrange gains giving you that get out front power, making these stacks a vital upgrade for any dedicated Honda rider. No other modification at this price point offers such significant gains in power and throttle response.
Custom 3D Printed Item Policy:
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