All AT Performance products come with two inlet ports. This M18 inlet plug is great to blank off one of the inlet ports if you are running only one breather hose from your engine. Add one of these to your cart, if it suits your requirements.
Please contact us if you are unsure what fittings you require. We love talking to our customers, and would much rather discuss your options, than send you a product that you are not 100% happy with.