J&G Performance Tuning - Your Mobile SoCal LSx Tuning Solution
Contact us for all your GM LSx tuning needs!
We are mobile and can come to you, or we can meet you at most any racing event.


Performance Street Tune: This is our most popular tune, they are done via wideband integration and optimized for the method the vehicle will be driven. We will adjust your entire fuel maps, timing map, idle control ... for precise and smooth drivability. If need be, the tune can be done at a closed track or legal racing venue.
Price: $350

Ultimate Power Tune: Much like a Performance Street Tune, but we will actually tune your vehicle on a load bearing dyno. This helps us extract the most power out of your setup for excellent power under the curve results. You will receive a dyno sheet print out of your results (which are corrected to SAE Standards). And when ever possible, we will also do a base run to compare the before and after results. This price includes dyno time.
Price: $550

Automatic Only Tune: If you have an Automatic equipped vehicle and only require your transmission to be tuned, due to an aftermarket converter install or a shift kit install, this would be the tune for you. We will recalibrate the transmission shift points, shift pressures and Torque Converter Clutch (TCC) lock up speeds (if equipped). This tune can also be added on to the Performance Street Tune and will optimize the new found power of your tuned vehicle. This tune can only be accomplished on the street with the customer, since automatic settings are very individual preference specific.
Price: $150

Power Adder Tune: This is an add on to our Performance Street Tune and Ultimate Power Tune for vehicle setups that utilize a supercharger, turbocharger, nitrous or a combination of the three. On boosted applications, and depending on the amount of boost, we will setup the vehicle to operate in a 2-BAR Speed Density Operating System. This allows for precise metering of the fuel when the boost kicks in.
Price: $200 extra cost

Basic Tune: This is our most simple tune, mainly for vehicles that need settings turned off. Examples would be (but not limited to): gear ratio adjustment, fans settings, speed limiter, remove CAGS, delete trouble codes, turn off DTCs and VATS disable. If you recently installed a late model GM LSx engine in your car, this basic tune would be ideal for turning annoying DTCs from keeping your conversion from starting.
Price: $50



J&G Tuning uses HPTuners and AEM Widebands exclusively!


GM V8 Vehicles Supported:
1998-2002 Firebird/Camaro
1998-2004 Corvette
2003-2004 SS-R
2004-2006 GTO
2004-2005 CTS-V
2002-2006 Avalanche/Escalade
1999-2007 Silverado/GMC Sierra
2000-2006 Tahoe/Yukon
2000-2006 Suburban/Yukon XL/Denali
2003-2006 Hummer H2