Ignition Projects Quad Spark Ignition Coil Set 2006-2010 WRX / 2004-2010 STI / 2005-2009 Legacy GT / 2004-2010 Forester

With constant research and development, we were be able to build the 
Quad-spark system directly into the ignition coil without using an external discharge box.  Our Quad-spark technology creates a secondary voltage and produces a 46% increase in secondary current.  Powerful quad sparks are generated in 1/1000 of a second at low-mid RPM (up to 3000 rpm) increasing throttle response and low end drivability. After 3000 rpm, the coil switches to a powerful single spark which is critical for performance engines.  As with all products from Ignition Projects, 
Quad-spark ignition coils are direct plug and play with the stock wiring harness.  No cutting or splicing involved.

FEATURES: 

• Eliminates misfire
• Increased throttle response
• Stabilizes and smoothens idle
• Quicker starts
• 46% increase in ignition power
• Easy plug and play installation