RSPANTERA FD3S/FC3S Pro R Muffler

Car Maker: Mazda
Car Model: RX7 FD3S/FC3S
This muffler is specialized for the performance required of a muffler: "Quietness and power up."
It has eliminated unnecessary bends and the "narrowed silencer" that is common in other companies' products, making the inside of the silencer completely straight.
The silencer shell is made of SUS304 and is 500mm long, and the capacity is maximized. The inside is made of 90φ roll punching to minimize resistance.
The main pipe is made of a special order 85φ, 1.2mm thick ultra-lightweight SUS409, which is also used in OEM products, and we have succeeded in reducing the weight while maintaining the inner diameter.
Lighter weight and more power.
It can handle a wide range of applications from boost up to full tuning.
It can be used safely even on circuits with strict noise regulations.
By keeping the volume within reasonable limits, an inner silencer is not required.
(This is my personal opinion, and it is basically a product for competition use only.)

For more details, please go through the below link
RSPANTERA FD3S/FC3S Pro R Muffler