Hey guys I just got my g35 but I want to make it louder. But i saw on YouTube that they were using y- pipe or x-pipe but I want to use the y-pipe. Can I use those with my regular mufflers or i have to buy something else. Thank you.

There are countless thousands of threads about exhaust systems, you should read, read, read. Find local G's with modified exhausts and listen to them IN PERSON. THEN buy the exhaust.

Here is a link to the intake/exhaust sub-forum.
https://g35driver.com/forums/intake-exhaust-23/

Closing this thread because it provides nothing to the community.