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Maybe you've found as I have that finding a quick and easy bolt-on performance upgrade that is truly effective can be quite elusive. Finding one that is 50-state emissions legal is about as hard to find as Sasquatch.
Well, these Holley replacement TBI throttle bodies for GM applications meet that standard. Simply unbolt the factory TBI throttle body, bolt on this 670 CFM beauty, make a few electrical connections and you are rolling with a significant boost in horsepower. Better yet, you may have added the performance equivalent of "Big Foot" to your engine compartment but you won't increase your carbon footprint a bit!