Replaced old dry vacuum hoses on my 2008 Saab 9-5 2.3T with these 4mm blue silicone hoses. Fits well and looks good on the engine. I didn't attach them to the connectors as the originals weren't pinched, but I did zip the longer sections together for a clean job. I'll review them over time as they age just in case clips are needed in the connector ports. I watched youtube videos on how to do the job properly. Very happy with this product and would recommend for similar use in any vehicle.