Reply To: P1 gear change. Welcome to the Allard Owners Club. › Forums › Technical Talk › P1 gear change. › Reply To: P1 gear change. September 5, 2023 at 12:00 pm #7881 Michael KnapmanParticipant Russell there are kits made in the USA by ” Mr Gasket”. They for lhd boxes but with a bit of ingenuity can be adapted to rhd boxes. David Kinsella had in in his P1 sold by Mathewsons earlier this year.