Using this ISR Performance tubular bottom mount manifold is a great way to upgrade your Nissan SR20DET S13/S14. First, make sure to check your turbo type. If you have a T25 or T28 stock turbo, you might need to adjust the turbo a bit to avoid the larger runners on the manifold. Installation should be done by someone with basic automotive knowledge or a professional mechanic. When it comes to maintenance, regularly check for any signs of wear, like cracks or loose connections. Keep it clean from dirt and debris. If you notice any issues, get it inspected right away. And remember, ISR orders usually take a day to process. If you're in a hurry, just give us a call directly.