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The Translator and T+ allows for use of a different MAF. The Extender is a chip that works in conjunction with the T+, and has many features. One of the notable ones is that it allows for MAF readings over the stock 255 limit. The Extender setup can be used with almost any size injector.
The MaxEffort thumbwheel is primarily a race oriented setup that allows for great tuning capabilities when using larger injectors. People do run them on the street with great results.
Bob and Steve can clarify in more detail.
HTH
Paul