the p5 definately wont be slower or even if you want, i have a few brand new engines sitting around that i might get rid of for the right price. i have an lrp28 and an s5 that are brand new. i also have a ttr pro 21 that is brand new but i doubt that you will be interested in that one. if you are interested in any motors then just give me a pm and i will see what we can work out