Not sure how much as I havent been invoiced yet, think its about £300.00, its a chipstar management system (milfordmicros.co.uk), so this can be updated as I add to the car a bit pricier than the other chips and cant really make a comparison, just trust the guys who looks after my car.
Ah the throttle body well Throttle Body Sets
Includes Throttle Bodies, Fuel Rails, Hi-Flow Injectors, throttle pot, Air Horns, ECU, Sensors, DIY wiring loom, & Instructions.
What does it give you, what does it do... have no idea, though the prices I have seen for the kit might be better to save up for a turbo!!!