this one show's big spring that the multi spring retainer replaces, the multi spring retainer is a good investment as it helps with the flare up problem that is common in 904's created by the large spring coming unwound at high rpm's, found this out by talking to Rick Allison a A@A

2652117-Bills904009.jpg (838 downloads)
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.