The WR Twin Plug Distributor is a new product for converting any 356 or 912 engine to two spark plugs per cylinder. The distributor uses a Pertronix Ignitor II unit which delivers a standard 12 volt signal that is not sensitive to interference like many magnetic triggers. There is no advance in the WR Twin Plug Distributor, and it's made to be used with either a programmable MSD 6AL-2 CDI box or an EFI control unit.
Twin Plug has been proven to significantly boost low and mid range throttle response, as well as allowing a one-half point higher compression ratio. It also adds a distinct look to any 356 or 912 engine. WR offers a complete Twin Plug Kit which includes the distributor, a preprogrammed and wired MSD CDI box, Magnacor plug wires, two coil options, upper and lower NGK Iridium plugs, and complete easy to follow instructions for installation. The MSD box is mounted under the passenger's side floor board and a period correct wiring harness connects it to the distributor. The entire installation is designed to look vintage and original.
WR can drill your 356 heads for twin plugs using an easily available CR7HIX NGK plug. The charge is $600 per set plus shipping.