High Performance Big Bore Exhaust Muffler Silencer - Deep CRF Sound

In this review of the High Performance Big Bore Exhaust Muffler Silencer full system, the bottom line is simple: it is for riders of 70cc to 125cc mini dirt bikes who want a deeper, more authoritative exhaust note and improved breathing without complex fabrication. The reviewer found the one-piece system straightforward to fit to many Chinese-made and common small-displacement bikes and appreciated that it delivers a noticeably throaty, raspier sound similar to larger CRF models while still working with stock engines. Installation is generally easy and the kit includes the main gaskets and hardware needed.

Key Features

• Complete one-piece system: Includes head pipe and tail section so there is no need to source additional parts for a basic install.
• Wide fitment compatibility: Fits a long list of 70cc to 125cc Chinese and popular mini dirt bike models, making it a versatile upgrade for many riders.
• Improved sound and breathing: Designed to give a deeper, throatier tone and better exhaust flow even on lightly modified engines.
• Removable pipe guard: A 28mm head with removable guard helps protect the pipe and makes maintenance easier.
• Hardware included: Supplied with a metal clip, rubber gasket, two gaskets and a screw kit to streamline installation.

Who It's For

This exhaust system is best for owners of XR50, CRF50, CRF70, many Apollo, SSR, Tao Tao, Lifan and similar 70cc to 125cc pit and dirt bikes who want a stronger sound and a modest performance feel without major engine work. It suits riders who value easy bolt-on upgrades and a noticeable change in tone and throttle response.

Riders who need an exact OEM replacement for a different model, those with CRF70F or XR100 models specifically called out as incompatible, or buyers unwilling to accept occasional gasket or sealing attention should look elsewhere or confirm fitment with the seller before ordering.

Pros & Cons

Pros

• Clear, deeper sound that transforms stock exhaust tone and is praised for sound quality.
• Good fit across many 70cc to 125cc Chinese and popular mini bike platforms.
• Simple installation with included gaskets and hardware makes it user friendly.

Cons

• Some customers reported leakage at the joint areas, so careful gasket sealing and checking is recommended.

Specifications

Our Verdict

For riders of small-displacement pit bikes seeking an affordable, bolt-on way to get a deeper CRF-style tone and improved exhaust flow, this full exhaust system is a strong value. It installs easily on many 70cc to 125cc platforms and includes the hardware needed, though buyers should inspect and seal joints carefully to avoid reported leakage issues.

Frequently Asked Questions

Will this fit my mini dirt bike?
Check the listed models and sizes against your bike; the system fits many 70cc to 125cc Chinese and common mini bikes but excludes certain models like XR100 and CRF70F.

Is installation difficult?
No, the kit includes gaskets and hardware and most users report straightforward installation with basic tools.

Does it improve performance?
It mainly improves exhaust flow and sound; some riders notice a modest change in throttle response, but major power gains require engine modifications.