Please no single exhaust only duals looking for something loud.

Image: http://cimg0.ibsrv.net/gimg/my350z.com-vbulletin/750×1334/80-image_2655d9799b9c88a5d845bc0f063077b33413c109.jpg

I heard it was 245-40-18f 265-40-18r just wondering what’s the widest you can go on stock 18.

Do u have to reset the ecu after installing a mod?

When I shift at high Rpms to second gear I loose traction it spin out what can I do to prevent this and is this common with 350z?

I’m looking for a loud exhaust for the 350z I like nismo but it didn’t seem loud enough I want people to hear me driving even if I’m goin slow. I own a 2006 350z. And is there any way I could make…