aFe 46-39112 aFe POWER 90mm Throttle BodyaFe 46 39112 aFe POWER 90mm Throttle Body Larger Bore Throttle Body: This aFe POWER 90mm Throttle Body and adapter kit improves engine air flow over the stock 80mm throttle body. The extra air flow will increase horsepower and throttle response. Performance gains will be more noticeable as more upgrades are added to the vehicle. 6061 T6 Billet Aluminum Adapter: All adapters are constructed from 6061 T6 billet aluminum and are precision machined for