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2003 Jeep Wrangler Performance Chips & Programmers

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Latest Customer Reviews

Jet Performance Module Reviews

Awesome change

Reviewed By Chris R (Murrieta, CA) Reviewed for a 2003 Jeep Wrangler —12/2/2013 10:18 PM

This had a great result which I had delayed trying thinking it would not measure up. My change was substantial in horsepower using the stage two tuner on a street 4.0 6 with Banks intake, headers, and an oversize exhaust. This brought all the pieces together, and I have not yet installed the 180 degree thermostat. Will see what impact this has in addition.

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Superchips Trail Jammer EXT Jeep Performance Package Reviews

more hp and perfomance!easy Instalation!BUT!!

Reviewed By hugo r (naples, FL) Reviewed for a 2003 Jeep Wrangler —3/13/2013 9:41 PM

I have 2003 jeep wrangler X.4 inch lift kit and 35 inch tires.the package works great in my jeep.the bad issue is doesn't work in the Tire size calibration of speedometer in my jeep 2003,just works on jeeps 2005 and up,and rubicon.

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Hypertech Max Energy Programmer Reviews

2003 Jeep Rubicon

Reviewed By Timothy K (Victoria, BC) Reviewed for a 2003 Jeep Wrangler —3/11/2008 7:58 PM

I reprogrammed my stock 4.0 litre 2003 Jeep with the Hypertech Max Energy Programmer, the reprogramming was simple, just fllow the instructions. I was able to set the RPM limit 500 rpm's higher, and programmed for horsepwoer/torque on 86 octane fuel. I could feel the immediate different, the lower rpm torque could be noticed, but the biggest improvement was at higher altitude, the power was there, that wasn't before. I was not afraid to pass slower traffic, as before it took considerable distance to pass slower moving vehicles. It also can clear or diagnose most error codes, which is helpful.

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