Using these PPE OEM Up - Pipes is easy. They are a direct bolt - on to your factory manifolds, so you can install them without any major modifications. Just make sure to use the included PPE 304 Stainless Steel Up - Pipe Gaskets for a proper seal. When it comes to maintenance, since they are made of stainless steel, they're quite durable. But it's still a good idea to check them periodically for any signs of wear or damage, especially the bellows. And remember, these up - pipes are emissions - legal in all 50 states, so you don't have to worry about any legal issues while using them. Enjoy better turbo response and lower exhaust temperatures with these high - flow up - pipes!