Andrew Posted August 28 Share Posted August 28 Does anyone know what the inner and outer diameters are of the BMW vacuum hoses that are used for the turbos? You can buy 1000mm lengths from BMW for ££££ but there are plenty of aftermarket lengths of silicone vacuum hoses you can buy for a fraction of the price. A Google throws up 3.5mm ID x 7.5mm OD form M57 and N55 engines but cannot confirm anywhere. Quote Link to comment Share on other sites More sharing options...
Steve VH Posted August 29 Share Posted August 29 Possible to measure external, then internal dimensions after disconnecting the pipe with a vernier calliper to the nearest 1/10 mm? 1 Quote Link to comment Share on other sites More sharing options...
Andrew Posted August 29 Author Share Posted August 29 Yeah I think I'll do that. Don't want to pull the hose off just to measure it in case something breaks and I'm stuffed. Quote Link to comment Share on other sites More sharing options...
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