Having a brouse around came across this other site! have look at the filter and fan thing anyone got experience of these??
http://www.hi-deal.com/shop/customer...7&cat=1&page=1
http://www.4x4web.co.uk/4x4-equipment-tests.html
http://www.hi-deal.com/shop/customer...7&cat=1&page=1
http://www.4x4web.co.uk/4x4-equipment-tests.html