For those of you wanting to supercharge, turbocharge or carry out other engine modifications, you will need one of these. This Italian-made Malpassi fuel-pressure regulator monitors your boost pressure and raises the fuel pressure proportionally to keep the right volume of fuel in the carburettor bowl. Weber Specialties has vast experience with blow-through carburettors, and say that it has found the Malpassi to be the best in the business for both carburetted and fuel-injected systems. Weber Specialties is also the Malpassi factory distributor for New Zealand, and carries the full range of Malpassi products in stock. Available for $184, contact Weber Specialties for further information, or head to weberspecialties.co.nz.