When it comes to high compression and cylinder pressures with redline revving RPM, the E93 Coil is the best choice. This coil was engineered from the inside out to handle the needs of race engines. Inside the low profile coil housing is heavy gauge wiring for use on both sets of windings resulting in a highly effective turns ratio of 601. The internals are encapsulated in urethane for protection against extreme vibration and abuse from racing environments. The secondary tower is also lengthened to aid in spark isolation and terminal connection.