I have a #11 Plate in my 98 5 spd right now and want to up it to the #10 plate for more power, I'm getting 4" Exhaust and a Scotty II, will the #10 be too much for the HX-35 or What ? Also what kind of power would a 1996 Auto make with the #11 plate ? A friend of mine wants it since I would need it. Thanks for any help..

 

The 10 is too big for the 35. You might sneak a 16 housing on the truck but the EGT will be very crispy

Sell the 11 and get him something else for an auto.