Jet Performance Chips1987-1995 Wrangler YJA "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. |
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Model |
Years | Transmission | Stage1 | Stage2 |
| JEEP WRANGLER YJ | 1995 | 4.0L AUTOMATIC |
Part # 99511 Price:$239.99 |
Part # 99511S Price:$259.99 |
| JEEP WRANGLER YJ | 1995 | 4.0L MANUAL |
Part # 99512 Price:$239.99 |
Part # 99512S Price:$259.99 |
| JEEP WRANGLER YJ | 1994 | 4.0L AUTOMATIC |
Part # 99411 Price:$239.99 |
Part # 99411S Price:$259.99 |
| JEEP WRANGLER YJ | 1994 | 4.0L MANUAL |
Part # 99412 Price:$239.99 |
Part # 99412S Price:$259.99 |
| JEEP WRANGLER YJ | 1993 | 4.0L AUTOMATIC |
Part # 99311 Price:$239.99 |
Part # 99311S Price:$259.99 |
| JEEP WRANGLER YJ | 1993 | 4.0L MANUAL |
Part # 99312 Price:$239.99 |
Part # 99312S Price:$272.99 |
| JEEP WRANGLER YJ | 1992 | 4.0L AUTOMATIC |
Part # 99212 Price:$239.99 |
Part # 99212S Price:$259.99 |
| JEEP WRANGLER YJ | 1992 | 4.0L MANUAL |
Part # 99211 Price:$239.99 |
Part # 99211S Price:$259.99 |
| JEEP WRANGLER YJ | 1991 | 4.0L AUTOMATIC |
Part # 99112 Price:$239.99 |
Part # 99112S Price:$259.99 |
| JEEP WRANGLER YJ | 1991 | 4.0L MANUAL |
Part # 99111 Price:$239.99 |
Part # 99111S Price:$259.99 |













