Ok so I have a 2003 track z it has a greddy evo2 exhaust and test pipes I'd like to take off the resonators on the exhaust and I've heard that's replacing the h or x pipe what ever I decide but where can I find them to buy or do I need to make it custom? I'm new to the 350z so I'm still learning so lmk if you guys can help

 

H and X-pipes are generic.You must buy the proper diameter for your car. There are several H and X-pipe threads here with more details. Read. Learn.