In this 914-2.0 1.7 fuel injected system, we used standard PVC elbow with installed barb fittings. Apparently, the K&N filter has a perfect diameter match with PVC elbow. This is one of our most successful items in our 914 inventory. The above intake, will replace the large metal air box of 2.0 and oil bath filtering system of 1.7 fuel injected 914s with K&N oval-tapered Filtercharger. It is a mistery why Bosch decided to make Oil Bath filters for 1.7s. However, the K&N filtercharger we provide also dipped in oil. Go figure. Our system attaches directly to the throttle body of 2.0 or 1.7. The filter will be positioned right under the open grill, taking advantage of the blown air. All air dependent hoses will be connected to the barb fittings on the PVC elbow as well as one up front for the California models. Our customers have reported that installing less restricted exhaust and this filter system significantly increase the engine response.