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Hello All,

I'm trying to get my 2003 Aston martin DB7 Vantage Volante to pass it's Smog test in Southern California. I live in Manhattan beach and the CEL is showing with DTC codes P1131, P0301, and P0300.

The car's service history showed a vacuum leak in the past and given the vacuum lines are all twelve years old, I was planning on replacing all emission vacuum lines with High Temperature High Performance Silicone vacuum hoses, to remedy any errand vacuum leaks.

However, I can't find the specs for the inside mm diameter and outside mm diameter for the current factory vacuum lines. Does anyone know what the specs are or has any replaced all the vacuum hoses with a better high temp grade that could send a suggestion my way.

Many thanks,

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