ISTUNT Motorcycle Complete Exhaust for Grom MSX125 2013-2020

In this review of the ISTUNT Motorcycle Complete Exhaust Fit for Grom MSX125 2013-2020, the bottom line is simple: this is a focused, budget-friendly performance upgrade for riders who want a sportier look and a modest power bump without complex installation. The kit is aimed at owners of the Grom MSX125 (non-SF) who value a stainless steel muffler with a distinctive blue-black dual-layer tip and a compact 310mm length. It is not a universal swap and arrives without an instruction manual, so those comfortable with aftermarket parts or basic wrenching will get the most from it.

Key Features

• Fitment: Designed specifically for Grom MSX125 2013-2020 models, ensuring correct mounting geometry when matched to the compatible chassis.
• Material: Constructed from stainless steel for corrosion resistance and a durable finish that stands up to regular road use.
• Compact muffler: The 310mm muffler length keeps weight low and preserves ground clearance while delivering a more aggressive exhaust note.
• Included hardware: Comes with a Z bracket, springs, spring hook and mounting bolts plus a 38-51mm adaptor to simplify fitting on compatible headers.
• Styling: Black tips with a blue ring inside provide a sporty two-tone look that complements modified small-displacement bikes.
• Performance intent: Marketed as an upgrade to increase power performance, making it a worthwhile option for riders seeking a noticeable change from stock.

Who It's For

The ISTUNT exhaust is best for Grom MSX125 owners (2013 through 2020) who want a straightforward visual and acoustic upgrade and are comfortable performing a bolt-on install without printed instructions. Enthusiasts who plan minor tuning or aftermarket intake changes will appreciate the exhaust's freer-flowing design as part of a modest performance package.

Riders who own the MSX125SF should look elsewhere because this kit does not fit that variant. Also, buyers who need factory documentation or prefer a removable baffle for quiet commuting should consider other options since this model ships without a removable baffle and without installation instructions.

Pros & Cons

Pros

• Stainless steel construction offers solid durability for street use.
• Compact 310mm muffler and dual-color tip deliver sporty aesthetics and better sound.
• Includes practical mounting hardware such as a Z bracket, springs, and a 38-51mm adaptor for compatibility.
• Specifically designed for Grom MSX125 2013-2020 for an accurate fit when used on the correct model.

Cons

• Arrives without installation instructions or a removable baffle, which may frustrate less experienced installers or those wanting variable sound control.
• Not compatible with MSX125SF, limiting applicability across similar model lines.

Specifications

Our Verdict

The ISTUNT complete exhaust is a pragmatic upgrade for Grom MSX125 owners who want improved sound, a sportier aesthetic and a small performance gain without spending a lot. It is good value when fitted to compatible models and paired with a basic installation; however, buyers who require a removable baffle or step-by-step instructions should consider alternative mufflers. Overall, it delivers solid style and function for hands-on riders.

Frequently Asked Questions

Will this fit my MSX125SF?
No. This exhaust is specified as not fitting the MSX125SF and is intended only for the MSX125 2013-2020 models.

Does it include all hardware needed for installation?
Yes. The package includes an exhaust header, tail pipe, Z bracket, 2 springs, spring hook, mounting screws and a 38-51mm adaptor, but it does not include an instruction manual.

Can the baffle be removed for louder sound?
No. This model is sold without a removable baffle, so the sound profile is fixed as shipped.