How to Big Boom

[Aerodynamic Kerbal]

What is the most explosive and destructive stock part in the game? Im planning on making a series of ballistic missiles.

[The Aziz]

VAB

dunno, biggest part, biggest boom?

[Aerodynamic Kerbal]

Yeah I guess...

[Aerodynamic Kerbal]

Yeah but its an actual question. The Ares 1 Ballistic missile is currently conducting tests.

[Ben J. Kerman]

Hmm... Interesting experiment. I'll might also conduct some tests. I saw a big boom when I turned one of my trucks 180 degrees inside its own trailer (I jackknifed the trailer, or it would have if I had turned on same vessel interaction), then decoupled the trailer. It exploded and started spinning around. That's different though, more of a Kraken thing since there were hundreds of parts.

The Kraken's Scania Kania! 

Anyway, I agree with The Aziz. The biggest part probably has the biggest explosion. I recommend fuel tanks. They are some of the biggest parts and contain tons of flammable materials.