Bendix or Slick?
When I ordered my engine from Aerosport Power I asked for dual P-Mags. I got a credit for the mechanical mags and they installed the P-Mags. I also took the auto plugs ($3 a pair) and harness. P-Mags work like a charm. No parts to wear out, dead smooth operation and average mag drop on run up is 20 RPM.
Mark