Welcome to 4GTuner
Register now to gain access to all of our features. Once registered and logged in, you will be able to create topics, post replies to existing threads, give reputation to your fellow members, get your own private messenger, post status updates, manage your profile and so much more. If you already have an account, login here - otherwise create an account for free today!
They aren't, mine was 60mm from memory, it promotes more torque though.
I'd go Tomei dump, front, 3inch highflow cat and if you're on stock turbo, then 3inch rear end isn't a must, you'll get a better street car with the slightly smaller piping.