If it were me, and you like the traxxas, Id buy it and then immediately yank the new 3.3 engine and sell it. Then you can use that money to buy a .28 from Losi, Dynamite, LRP, Picco or SH to pop in that bad boy. You'll notice quite a difference going from a .20in³ (or a 3.3cm³) to a .28in³ (or 4.6cm³) sized engine. Heck you could even jump up to a .30in³ (or 4.9cm³) or .32in³ (or 5.2cm³) engine if you really wanted to. I love Traxxas trucks and their engines arent bad, they just aint big enough in most peoples opinions.