Whats up honda fans, needs some help on my 1st real mod on my stock 4-cylinder, 5 speed 94 civic Dx. Looking to get an idea on what is a good size muffler to give me a little power with a nice low deep sound. Thanks for the help.

 

Read the FAQs, it explains a lot.

But a muffler in and of itself will not increase HP much if at all. You need to at least put on a full cat back to see any power gains.

Doing a full header, hi-flow cat and cat-back will see even greater gains.

 

About 6 inchs is the avrage size.

if I understood the question right.