The standard type 9 Middlebridge Manual Gearbox is near its performance limit in the Middlebridge Scimitar and BGH Geartech are acknowledged experts in this field and can spec a box to deal with your power output and any other requirements. BGH gearboxes are used widely with great success in many areas of motorsport. A BGH gearbox is fitted into one MB with a 200BHP engine with no problems at all to date.

http://www.bghgeartech.co.uk

Many thanks to Trevor for this valuable tip.