| This stud is exactly like the original studs used by Nissan. They use a shoulder in the same spot and the same length as what came on your L engine when it was new. This listing is for a single unit so if you want a complete set be sure to order the correct amount that you need. This stud is used on each end of the exhaust manifold and it is used on the siamese washers as well. If you would like the nuts and washers to go with this order check the listing. If you don't know how many you need and you want a complete set just let us know what the year and model of your engine is. You can do this by either contacting us directly, or you can put a note in the comment section of the order form and we can figure out how many it is that you actually need. Remember we have a 10.00 minimum order. Last update 12/11 | 
