Which is it fools? Piston slap or pistol slap? The BFD. Stuff up of the day. Source: stuff.co.nz/national/118921580/man-wins-48000-refund-battle-over-unacceptably-loud-engine-in-holden-v8 If you enjoyed this BFD Stuff up of the day please consider sharing it with your friends. Related The BFD Staff A contribution from The BFD staff. More by The BFD Staff