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Jet Performance Chips

1987-1995 Wrangler YJ


A "Stage 1" performance chip is ideal for the person looking for a little extra horsepower, without a lot of modification. This stage allows our customers, with stock or barely-modified vehicles, to use a performance module with less expensive, lower octane fuels (87 octane). With Stage 1, the programming is set to burn fuel at peak efficiency resulting in not only optimal performance, but gas savings as well.

A "Stage 2" Performance Module features the most extensive programming to enhance horsepower to it's greatest potential and maximize torque. Fuel (Requires 91 Octane) and timing curves are modified extensively for peak performance and drivability. This stage also requires the use of a 180 degree thermostat and free flow exhaust. An Aftermarket Air Intake System is highly recommended for a Stage 2 Performance Module.

Image Years Engine/Transmission Stage 1 Stage 2
1995 4.0L Automatic 99511

$239.99
+ FREE SHIPPING
99511S

$259.99
+ FREE SHIPPING
1995 4.0L Manual 99512

$239.99
+ FREE SHIPPING
99512S

$259.99
+ FREE SHIPPING
1994 4.0L Automatic 99411

$239.99
+ FREE SHIPPING
99411S

$259.99
+ FREE SHIPPING
1994 4.0L Manual 99412

$239.99
+ FREE SHIPPING
99412S

$259.99
+ FREE SHIPPING
1993 4.0L Automatic 99311

$239.99
+ FREE SHIPPING
99311S

$259.99
+ FREE SHIPPING
1993 4.0L Manual 99312

$263.99
+ FREE SHIPPING
99312S

$272.99
+ FREE SHIPPING
1992 4.0L Automatic 99211

$239.99
+ FREE SHIPPING
99211S

$259.99
+ FREE SHIPPING
1992 4.0L Manual 99212

$239.99
+ FREE SHIPPING
99212S

$259.99
+ FREE SHIPPING
1991 4.0L Automatic 99112

$239.99
+ FREE SHIPPING
99112S

$259.99
+ FREE SHIPPING
1991 4.0L Manual 99111

$239.99
+ FREE SHIPPING
99111S

$259.99
+ FREE SHIPPING

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