The new JMS PowerMAX® SparkMAX ignition voltage boosters features exclusive JMS digital technology and are designed to provide up to an 85% increase in spark delivery.

The JMS PowerMAX® provides the highest continuous voltage and amperage output without noise, and is available in true 40-amp input fuse configuration. Another industry first includes the ability to choose how to enable the SparkMAX units voltage-boosting output. The device activation options allow you to choose the device that works best for your specific vehicle installation.

JMS was the first company to produce a plug and play ignition voltage booster for the Mustang, and their new PowerMAX® SparkMAX unit carries that innovation even further. For users that want the ultimate in easy installation, choose the new plug and play option that connects to the main ingition wiring harness. Also available is a universal device that is easy to wire in, just cut and splice a single wire.

The recently updated PowerMAX® has an all new proprietary enclosure and industrial heat-sink, featuring 10 gauge heavy-duty wiring with a 40 amp fuse along with a host of new and innovative features to further improve the user experience. The maximum output voltage range is user selectable and is controlled by a knob in the faceplate, or via the optional in-cabin over-ride control knob that adjusts voltage on the fly.

JMS is the only company to offer user-adjustable voltage ramp in and ramp out rates. This feature allows the user to correct and eliminate fuel pressure spikes that occur when fuel pump voltage is rapidly increased or decreased. You now have maximum control over the voltage ramp-in and ramp-out rate and depending on model, voltage can be controlled via time or boost pressure or it can be controlled via time or monitored voltage, and it's easy to setup via simple to use knobs and switches.

JMS PowerMAX® Voltage Booster Kits are shipped complete with everything you need for installation. Included in the kits; PowerMAX® device, heavy-duty OEM-grade wiring harness, user adjustable Hobbs pressure switch, 1/8" NPT adaptor fitting, wiring terminals, wire splices and heat shrink, solder, vacuum line and tees, mounting hardware, and 40 amp fuses.