ORIGINAL: Tornado BB Pro
Also, I was wondering if a motor with a round exhaust outbore is better than the retangular one? It seems like the air flow is retricted with the retangular. But who am I to say?
you can use a different header, something for an hpi .15 should work, i put one in my hpi rs4 3 evo and it bolted up to the os engine, just make sure its for the same side exhaust. that engine all aboutfun posted is nice but its not as powerful as the os .18, its good for racing since thats the size engine allowed. Also that sts engine has a slide carb and you need a rotary one. I was looking to get the .28 sts for my hurricane