Jeep 4.0 Performance Head
Jeep 4.0 Performance Head . 4.0l head swap on a jeep 258 4.2l engine. 4.0l in line 6 cast # 0331, 0630, 7120. This is a direct bolt on cast iron cylinder head to replace your factory casting. Brand New Jeep Cherokee Laredo Amc 4.0 0331 Complete from www.vehicles-classifieds.com Actual displacement is around 3,965cc which is rounded up to 4.0l. Originally, the engine was designed by the american motor company, but it was later refined by chrysler.