Performance Distributors GM LS/VORTEC SOS Coils - Manual (Page 7)

From left to right: An SOS coil pack next to a
factory coil pack, the factory coil packs completely
removed, the spark plug wires removed, and the
SOS coil packs completely installed.
Installation of the new SOS coil packs was just as easy as
removing the stock ones – one connector, two bolts, and
one spark plug wire for each coil, and we were done.
The Automotive Lie Detector Test Results
With the car buttoned up (and still strapped to the dyno),
we fired it up and let the roller spin. To be honest, we had
modest expectations for any improvement; after all, the
stock LSA ignition is about as good as a factory setup gets,
and we had seen no previous evidence of misfires on this
engine, even after our modifications.
!