A good but incomplete solution
Reviewed By Darren T (New York, NY) Reviewed for a 2009 Chevy Malibu —8/6/2011 12:43 AM
The stage 2 Jet module I purchased for my 2008 Impala provided a subtle but discernible performance increase but because it does not affect transmission performance(shift points,firmness, etc.) it does not maximize performance from my cars' powertrain. I recommend this product because it strikes an acceptable balance between speed and driveability. Instructions were clear and installation easy.