You will have to modify the front of the seat box and the transmission tunnel to accommodate the new position of the gear-box and transmission tunnel. Use a 300tdi rear prop. The front Y section of V8 exhaust should mate with the rear 2/3 of the Defender exhaust. M57N Oil Filter Housing Relocation Adapter Plate. £ 125.00 Excl. VAT. 1. 2. →. We offer a range of adapter kits from Engine to Gearbox kit as well as Gearbox to Transfer box kits. We cater to manual gearboxes as well as automatic. We are constantly developing new adapter kits that help users get the configuration they need, whether its for a According to Electrogenic, the conversion kit for the agricultural Defender can save owners at least $7300 (£6,000) over the course of a year with the regular use generally found in farm work. This would have the conversion kit paying for itself over just four years of use as the retail cost of the kit is around $29,500 (£24,000). With the latter, a Land Rover Defender is apparently able to sprint to sixty in under 3.5 seconds, making it several times quicker to accelerate than any factory gas-burning variant. The 100 kWh ocOI.