ball and spring... and nope i havent read that. maybe i'll look it up.
and as for spiking, i dont really care for now. the price was right, im just happy to have a little more control over my boost compared to a few washers on the wastegate -- hehe changing boost that way is a tad slower "yeah, i'll just yank off the entire intake, drop a few washers down the engine bay, fish around for those for a hour, yank out the wastegate and raise the boost! no prob!" well thats sorta what its like
