Hybrid Racing lines are pressure tested and pre-assembled utilizing a -3AN Teflon hose encased in a braided stainless steel line. When performing a K-Series swap you need to connect your clutch slave cylinder and master cylinder together. The stock clutch line on most k-swapped cars will not mate up to the slave cylinder on the k-series' transmission. The Hybrid Racing K-series Clutch Line Conversion allows the motion from the clutch pedal to be transferred to the clutch fork. The OEM line is too short and the fittings are not the correct size. They are not designed to work with the K-series slave cylinder.