Matt – Throttle human body spacers don’t do nearly anything on a modern fuel injected vehicle. During the aged carbureted times, a spacer among the carb and also the ingestion manifold was a fantastic incorporate (according to how your carb was tuned). Thanks for subscribing to our publication. Look out https://www.upenauto.com/how-to-boost-your-cars-performance-with-high-quality-downpipes/