Yoshimura · Full System
The Yoshimura GP-Magnum Full Exhaust / Titanium Blue Muffler is a Race Series Exhaust System built to match the Honda Monkey’s retro-inspired look while delivering the classic Yoshimura JDM style riders chase. Designed as a Full System, it’s built for Honda Monkey 2019–2026 (see the fitment table below).
This system uses stainless steel construction throughout the system with a titanium sleeve option that displays a one of a kind bluing effect and is finished with an old school Yoshimura badge. Yoshimura also notes the GP-Magnum Titanium Muffler Full System weight is 4.9 Lbs. vs Stock Full system weight: 11.2 Lbs. A Yoshimura right side cover is available but sold separately.
Created to complement the Monkey’s late 60’s early 70’s retro styling, the GP-Magnum is aimed at builders and racers looking for a classic Yoshimura JDM look and feel. The system is topped off with an old school Yoshimura badge for an authentic finish.
This version features a titanium sleeve option that displays a one of a kind bluing effect. Yoshimura pairs that distinctive appearance with stainless steel construction throughout the system, delivering a purposeful, race-inspired look that stands out on a Honda Monkey build.
Yoshimura R&D is the only authorized distributor in North America for Yoshimura Japan (YJP) and Yoshimura Asia (YAT), working with them to develop and test components for this marketplace.
Engineering
Both use stainless steel construction throughout the system with two sleeve options; this model features the titanium sleeve that displays a one of a kind bluing effect. The look is completed with an old school Yoshimura badge that reinforces the period-correct GP-Magnum vibe.
Materials
For riders focused on trimming mass, Yoshimura publishes clear weight numbers for this configuration. Yoshimura GP-MAGNUM Titanium Muffler Full System weight: 4.9 Lbs. vs Stock Full system weight: 11.2 Lbs. Those figures provide a straightforward reference for anyone planning a Honda Monkey 2019–2026 build around a full exhaust system.
Fitment
This Yoshimura Full System is listed for Honda Monkey 2019–2026; confirm exact application details in the fitment table below. The product page also includes an installation PDF for step-by-step guidance, along with a product video and dyno chart media. Yoshimura notes a right side cover is available but sold separately for riders who want that additional component.
| Part Number | 121300U700 |
|---|---|
| Brand | Yoshimura |
| Product Line | Race Series Exhaust System |
| System Type | Full System |
| Material | Titanium |
| Shipping Weight | 1 lb |
| Barcode | 00840025909960 |
| Emissions Compliance | QUALIFIED MANUFACTURER DECLARED "MODIFIED PART" |
| Make | Model | Model Years |
|---|---|---|
| Honda | Monkey | 2019–2026 |
Fitment as listed by Yoshimura for part number 121300U700.
Installation Instructions (PDF)
Provided by Yoshimura. Opens in a new tab.
