The GKTECH braided clutch lines are a direct replacement and are stronger than the OEM lines. The OEM lines are rubber which are economical to produce but after 15 years, they're prone to splitting and are susceptible to expanding which in turn gives a spongy feeling, particuarly when heat is introduced. Our braided clutch lines remove this spongy feeling and our optional high temp heat sleeve helps even further. The GKTECH braided brake lines are assembled by us in-house in Australia using stainless steel fittings, stainless steel braided line with a Teflon inner tube and PVC outer for protection. They have passed independent testing and are marked as complying to FMVSS106 standards, this means they continue to be ADR approved and are DOT compliant.   Vehicle Compatibility: - Nissan Z33 350z (up to '07) - Nissan V35 Skyline (up to '07) NOTE: Not to be used for auto to manual conversions as it does not replace the steel line, only the OEM rubber line. NOTE: For models up to 2007, they use a banjo fitting on the gearbox side whereas from 2007 they use a straight fitting. If you are unsure please double check before purchasing. FITS BOTH LHD AND RHD MODELS