Gasoline The Gasoline and Vapor Gas vehicle product line is designed to fit almost all gaseous fuel engines 35HP and larger. Click the link to view your options from Basic to Xtreme Series. Small Diesel The HS 415 is the Diesel system for small turbo charged diesel engine applications, in cars, light trucks and similar stationary engines. This unit is also used in non-turbo applications with slight modifications. Mid Diesel The HS 320 is the Diesel system for Medium Duty trucks and stationary applications of like engine size. Large Diesel The HS 320 HO is the Diesel system for Heavy Duty trucks and stationary applications of like engine size. Motorcycle The MicroThrust system was designed for motorcycles and other small gasoline and vapor gas four-stroke engine applications, such as lawn care, golf course, off-road powersports and outboard marine applications. Industrial The Aquatune D is the Diesel system for Off-Highway trucks and stationary applications of like engine size.This model is typically for 750-1800 HP diesel engines and can be used in a modular system for even larger engines. Aircraft The Aquatune Airplane is a system designed for experimental aircraft.. Marine The Aquatune Marine product line is a custom series for marine applications from your bass boat to commercial diesel-powered boats.