then get the ministry to clear it as an adjustable/replacement rear load valve which its gonna need anyway and as its a kit car I cant see your own design being an issue and/or fit the relevant cage/harnesses etc for it to qualify as race/rally and avoid all the hassle,the ministry rqmnts for that shud be in the mot guide/manual and are available from gov.uk.cant speak for sva as its done by the ministry not us dumb testers so their rqmnts could be different,again check with dvsa.
