The ultimate guide on how to make a fibreglass/FRP/GRP split-mould/multi-part mould. Step-by-step instructions on how to create a 3-part mould for a complex airbox pattern. This is part two of a three-part project on how to make an ultra-light, carbon fibre airbox using state-of-the-art prepreg (dry) carbon fibre. Visit https://www.easycomposites.co.uk/ for more details or to buy the best in advanced composite materials.