This Consists of: - Upper supercharger pulley - Lower supercharger pulley made of high grade aluminium, precision engineered and dynamically balanced for perfection and quality checked. - Heavy duty supercharger drive belt. - High flow air filters. - A performance remap that has been specifically developed for this kit. - Any pulleys and fitting relevant to your model of car/engine. (please provide details). 5.0 supercharged engine: Confirmed gains of up to 169 bhp / 171ps. Therefore some vehicles have reached up to 672bhp /681ps. 3.0 supercharged engine: Confirmed gains of up to 99bhp / 101ps. Therefore some vehicles have reached up to 435bhp / 441ps of power. Compatible with 3.0 & 5.0 Supercharged Jags, as well as 5.0 Supercharged Range Rovers