Yes amazing engine, very easy to tune, and a ton of power. Make sure you get steel spur gears because I've gone through 4 plastic ones on my Mammoth ST. I recommend this engine to anyone. XTM makes great engines, very reliable, and just as much power as a picco, novarossi, and grp. If it has too much power for you than i recommend the XTM 24.7. I love XTM Racing, they are my favorite company, and with the right steering servos, and a steel spur gear for that 457 pro youll finish in

noooo problem! Like I already said I recommend XTM products to anybody except the Mammoth ST unless it has a roll cage or dadders/rc visions chassis brace otherwise the chassis on that particular truck will flex under all of that power since it is actually a 1/7 scale truggy. I hope this helps, with that 457 for the $160 it costs....totally worth it 100%
Also I encourage buying only one brand and type of glow plug for XTM engines because others are too long and will bang against the piston
XTM plugs
http://www.hobbypeople.net/gallery/146021.asp
SH plugs
http://www.hobbypeople.net/gallery/147024.asp