I have a GTX supercharged 4-tec and have the stage 1 kit from Riva on it and also have the Riva intake grate that came with the stage 1 kit. Was wanting to know from anyone with a RXT what they have experienced and what grate do you think would help me to get more MPH the stock one or the RIva one? Also did it hurt anyone doing this by leaving the stock grate on does it still stay in the water good in chop? As I know my Riva grate I stay in the water good in chop and my MPH is descent but can't remeber how the stock one preformed. Thanks for anyones input