GREHUA 28mm Exhaust Muffler Assembly for 50-125cc Pit Bikes - Durable

In this review the GREHUA 28mm Exhaust Muffler Assembly is evaluated for small pit and dirt bikes that need a full replacement exhaust without hunting down extra parts. The bottom line: this kit is for owners of 50cc through 125cc bikes who want a ready-to-install metal exhaust that improves sound and fits many Chinese and popular mini models. The reviewer found it notably durable, straightforward to install, and delivering the aggressive dirtbike tone many riders expect from an aftermarket silencer.

Key Features

• Complete kit: Arrives with muffler, header, metal clip, mounting screws and a heat shield wrap, so no extra parts are required for installation.
• Broad fitment: Designed to fit 50cc, 70cc, 90cc, 110cc and 125cc pit bikes including CRF50, XR50, SSR110/125 and many Chinese brands, making it versatile for owners with common mini models.
• 28mm inlet size: The connection head inside diameter is 1.1in (28mm), which matches the intake flange on many small-displacement engines for a secure seal when sized correctly.
• Solid construction: Built from metal with sturdy welds, the assembly feels robust and resists the light impacts and heat typical of off-road use.
• Sound quality: Produces a more pronounced dirtbike tone compared with stock mufflers, which many riders prefer for trail and pit use.

Who It's For

This exhaust suits owners of small-displacement pit bikes who want a complete replacement part that is ready to fit without ordering adapters or extra hardware. It is especially useful for riders of SSR110, SSR125, Taotao DB10/DB14 and common Chinese-brand bikes that share a 28mm header interface.

Riders who should look elsewhere include those with models explicitly excluded (for example certain Hond models other than CRF50 and CRF50F, and Apollo RFZ 125) or anyone who needs a custom-tuned pipe for racing. Also measure your header flange before ordering to confirm the 1.1in inlet and 1.77in eye-to-eye dimensions match.

Pros & Cons

Pros

• Comes as a full assembly so buyers do not need additional mounting parts.
• Good build quality and welding give a durable feel for trail use.
• Improves exhaust note to a more aggressive dirtbike sound that many riders prefer.
• Wide compatibility with many 50cc-125cc pit bike models simplifies selection.

Cons

• Clamping hardware has mixed reviews; the set screw on the silencer clamp can be less secure than expected for some installations.

Specifications

Brand	GREHUA
Fitment	50cc, 70cc, 90cc, 110cc, 125cc pit bikes (CRF50, XR50, SSR110/125, Taotao DB10/DB14, etc.)
Connection head inside diameter	1.1in (28mm)
Eye-to-eye	1.77in (45mm)
Package contents	Muffler, Exhaust Header, Metal Clip, Screw set, Heat Shield Wrap
Material	High-quality metal with welded construction

Our Verdict

The GREHUA 28mm Exhaust Muffler Assembly is a practical, value-oriented replacement for riders of common 50cc to 125cc pit bikes who want a durable, louder-sounding exhaust delivered as a complete kit. It is good value for street or trail use when the 1.1in inlet matches the bike; check clamp hardware if planning heavy-duty mounting or competition use.

Frequently Asked Questions

Will this fit my 110cc SSR?
Yes, the assembly is listed as compatible with SSR110 when the bike has a 28mm inlet; confirm your header diameter before installing.

Does the kit include mounting hardware?
Yes, it ships with the muffler, header, metal clip, screw set and a heat shield wrap so no extra parts should be needed.

Is the clamp secure for off-road use?
Most customers find the clamp and mounting adequate, but there are mixed reports about the set screw holding the silencer; you may want to inspect or reinforce the clamp during installation.