As Firebane said, the salad bowl mod is for tbi intakes and removes the restrictive choke collar from under the air cleaner and replaces it with something that allows more air flow. You can buy ones that are done and ready to go or make one yourself which is what I did.
One bowl from the 99 cent store with the rim slightly trimmed to follow the contours of the air cleaner housing. (A smaller bowl would have eliminated the need to trim but this one was all they had.) The bottom of the bowl was a little wobbly (thin material) after being opened up so I cut the rolled edge off of the choke collar and press fitted it onto the bottom of the bowl.
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The bottom of the oem housing was trimmed out to match the diameter of the bowl, and for this application a second snorkel was added. The end result is a high flow, cold air intake that's Cali smog-check legal.