Bosch Blue Coil recommended for 4cyl and 6cyl applications (Resin Filled)

Product Description

3.4 Ohm Bosch Blue Coil made in Brazil.

Best choice for most Street Machines in either 4 or 6 cylinder.

A hotter coil would be the Bosch Red 1.8 ohm

NOTE: Oil filled coils should never be mounted sideways or upside down.

Bosch Coils are resin filled and can be mounted safely in any direction.

Some notes from Bosch

The Red and Blue coils are 'resin' filled, not oil or epoxy filled. The resin they use is tested to be much better than even epoxy when it comes to vibration and mountability.

As for the power output from the coils, the coil industry severely 'pads' their numbers to sell coils. So a 45k volt coil that other companies claim is more like 35k-40k. The Bosch Red coil is better than any other performance coil out because the resin they use inside is much better, and the power output is 'at least' what any others are putting out. A stock coil puts out about 17k volts, and the blue coil is more than twice as strong as a stock coil.  The Red coil is stronger than the blue coil by around a 25-30% margin.