ADV150 Race GP-MAGNUM Full Exhaust: What to Expect
By Yoshimura R&D of America, Inc. | Published: 2026-10-26
Category: Buying Guides
Considering a Yoshimura Race GP-MAGNUM full exhaust for your ADV150? This guide explains performance gains, fitment, and who this system is for.
Quick answer
The Yoshimura Race GP-MAGNUM full exhaust is a performance-focused upgrade for the Honda ADV150 that unlocks extra power from the 149cc liquid-cooled engine, but it requires a commitment to a louder, race-oriented system without a center stand or stock silencer.
What this system changes
The GP-MAGNUM is a full exhaust replacement, meaning it replaces both the header pipe and the muffler. That changes the ADV150's exhaust path completely, which alters how the engine breathes and sounds.
Because it is a race-series product, it is tuned for maximum flow and performance rather than noise compliance or comfort features. You will notice a deeper, more aggressive exhaust note and a small but real increase in peak output.
Trade-offs to consider
The GP-MAGNUM system does not retain the stock exhaust's heat shield or catalytic converter, so the muffler and header will get hotter than the originals. Plan for careful routing of nearby plastic panels and avoid touching the pipe after riding.
The ADV150 comes with a center stand that rests against the stock exhaust. This aftermarket system may require a center stand removal or modification, or you may need to add a support bracket. Check fitment before committing.
Decision rules for the GP-MAGNUM on ADV150
- Performance priority: If your main goal is maximizing power output and you are willing to re-jet or adjust the ECU, the GP-MAGNUM delivers a measurable improvement over stock.
- Noise tolerance: This is a race muffler. Expect significantly louder operation than the stock exhaust. If quiet cruising matters, look for a silencer insert or a different system.
- Center stand & accessories: The stock center stand contacts the GP-MAGNUM muffler. Plan to remove the stand or install a stand-off bracket. The system does not include one. If you rely on the center stand for daily parking, factor in the extra cost and effort.
Product facts
- ADV150 2021 Race GP-MAGNUM Stainless Full Exhaust, w/ Stainless Muffler: This Race GP-MAGNUM full system is designed specifically for the US market by Yoshimura Asia, tuned for the liquid-cooled 149cc automatic belt-driven scooter engine. It means the system is purpose-built for the ADV150's engine characteristics, not a generic universal pipe, so you get a proper fit and performance curve.
ADV150 2021 Race GP-MAGNUM Stainless Full Exhaust, w/ Stainless Muffler
Who this exhaust is for
Best for
- Riders who want the maximum available performance from the ADV150 engine
- Owners comfortable with a louder, race-oriented exhaust note
- Those willing to modify or remove the center stand for a cleaner look and weight saving
Not for
- Riders who need a quiet, neighborhood-friendly exhaust
- Owners who want to keep the stock center stand without modification
- Anyone looking for a simple bolt-on upgrade without tuning or fitment adjustments
