basically, it gives a bigger surface area over the stock servo giving u more apply pressure. its said to give 50% more pressure over stock, and i deff. back that up. and it makes the 1-2 and 2-3 shift quicker and firmer. w/ my 5.3 and bolt-ons, my tires chirp when i shift into 2nd. most deff. worth the $20. you can also get it cheaper if you go to oregon performance's ebay and buy it from there.



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