Jet Performance 99111S Performance Stage 2 Module for 1991 Jeep® Wrangler YJ with 4.0L Engine & Manual Transmission
Stage 2-Designed for the performance enthusiast, the Stage 2 features more aggressive programming to make the most horsepower and torque available. Fuel and timing curves are extensively modified for peak performance and drivability. Requires use of 91 octane fuel, 180 degree thermostat and free flow exhaust. Also works well with aftermarket intake systems, mass air sensors, TBI spacers, etc.
JET Power Control Module
Jeep Wrangler (YJ)
- 1991 Jeep Wrangler (YJ)