When lifting a jimny over 80mm you will need to extend the factory brake lines, as you flex you place alot of stress on the brake lines and this can cause a major problem out in the bush.
The brake line kit extends your brake lines from 5 to 8 cm longer than the factory units while looking exactly the same! ( just longer LOL!! )
fitting can be a pain so if your not sure then its best for a mechanic to do, be it friend or work shop.
Notes for new players: replaceing factory brake lines with aftermarket units is not legal on the road in australia, these are for off road use only.