Quiet Cat-Back Exhaust

[DreadAngel]

OP, it would be ideal to check out cars both irl and Youtube to gain an idea what you consider to be quiet and acceptable.

For example for me:
NB - Might not apply to FD1, this is based on my experience across older models of Hondas
NB - Some of the exhaust I've experienced

Quiet
Mugen Twinloop [Muffler]
Fujitsubo Legalis R [Muffler]

Mild
Fujitsubo RM01A [Cannon]
* Depending on Car
Fujitsubo Super Legalis-R [Muffer]
Spoon Street Muffler [Muffler]
Kakimoto-R [Muffler]

Moderate
Toda High Power [Cannon]
Fujitsubo RM01A [Cannon]
* Depending on Car
Fujitsubo Power Getter [Cannon]
HKS Silent Hi-Power

Loud
Apex'i N1 Revo [Cannon]
* JASMA 98 Approved
Buddyclub Spec III/IV [Cannon]
Kakimoto Fullmega N1 +Rev
* JASMA 98 Approved
Spoon N1 [Cannon]

GTFO
Apex'i N1
* Not JASMA Approved
Kakimoto Fullmega N1 2000 [Cannon]
Kakimoto GT1 0Z Racing [Cannon]

These are just some example of exhaust you could base your own system on. Some research on exhaust will help you decide what size, material, sections [Resonators, Muffler, Cannon] and specs you need. You might want to check out something like HKS ES Premium, Mugen Twinloop and Honda Type R exhaust. They may have a more complex design but might give you some inspiration to give you power, noise and comfort without needed a variable system like the X-Force Varex You might not apply this to your FD but it'll help you with other cars in the future