Not all throttle body spacers are as effective in increasing the power output of your Bronco which means that some are going to be more consistent and smooth while others are going to be more aggressive. Also look at how these will affect your engine efficiency, emissions, and reliability.
Consider the level of technical expertise and tools required to install the throttle body spacer. Some spacers may be relatively simple to install, while others may require modifications to the engine or intake system, and some may require tuning adjustments to optimize performance.
Look for throttle body spacers from reputable manufacturers that use high-quality materials and components such as aluminum or carbon fiber. Low-quality components may not withstand the increased stresses of a modified engine, which could result in premature failure and costly repairs.
In general, the installation process involves removing the factory throttle body and installing the spacer in between the throttle body and intake manifold.
Some spacers may require additional modifications, such as drilling or tapping holes in the intake manifold or throttle body, so it is important to carefully follow the manufacturer's installation instructions.
When attempting to install a throttle body spacer yourself, it is important to have the necessary tools and equipment, such as socket wrenches, torque wrenches, and gaskets, as well as a clean and well-lit workspace, preferably in an enclosed environment such as a garage.
It is also important to take your time and follow the instructions carefully to ensure a proper and safe installation.