DESCRIPTION DESCRIPTION: Adapts the stock Mustang GT manifold to the 87mm Bullitt throttle body.Includes everything you need to install the adapter plate. This throttle body adapter plate has a bolt-in installation and easily lets you upgrade to the 87mm Mustang Bullitt throttle body without upgrading your 2018-2021 intake manifold. 2015-2017 GT are also able to adapt the GT350 87mm throttle body using this spacer. Upgrading to the 87mm throttle body will help improve throttle response and let you get more out of other upgrades to the intake system. This throttle body adaptor kit comes with the adaptor plate, an o-ring to seal the plate, and the needed bolts to attach the throttle body. FITMENT & FEATURES FITMENT & FEATURES: Installation Information:Level of Difficulty: MediumInstall Time: About 30 MinutesTools Required: Basic hand toolsVehicle Fitment:Fits Model Year: 2015- 2021