For DAVID BROWN 1290 1294 1390 – Exhaust – 57MM OD. Gwynedd Farm Machinery Part No Q52656 (Please quote when contacting us). DAVID BROWN 1290 1294 1390. All Major Credit /Debit Cards Accepted. Heavier deliveries are dispatched same day if ordered before 12.00 noon. All Items listed in this shop are in stock ready for dispatch. We reserve the right to apply a surcharge for deliveries to the following postcodes. AB DD FK IV KW PA PH GY, HS, IV41-49, IV51,55&56, JE, KW15-17, PA20, 41-49, PA60-78, PH42-44.