TODA RACING Big Single Throttle For S2000 F20C AP1 16400-F20-130Brand TODA RACING Series Name Big Single Throttle Product Number 16400 F20 130 Compatible Car S2000 Compatible Models F20C AP1 Product Description Increased diameter from 62mm (stock size) to 65mm. The inlet has also been increased to a diameter of 70mm which then tapers down to the throttle diameter of 65mm Improvements in power through the extra air that this Big Single can now flow as well as improved response. Engine Type: F20C (130 model) Remarks