I am ordering a new engine and pipe combo from Stormer. I was wondering if this wouls be a good combo for my Hellfire: Axial .28 Spec 1 and an Ofna JP-3 header and pipe. This will be used strictly for bashing with my son and his Revo. What do you guys think?

Lastly, Stormer has an Axial .28 Spec 1 Pro for $20 more than the .28 Spec 1. I can find any info on the Pro version on Axial's site. Does anyone know the difference?

Thanks,
Joe