Mean-Green MG3209-J3 Premium Starter: Jeep Grand Wagoneer/(J) Full Size/Gladiator/Pickup The Mean Green Alternator provides up to 300% more power than stock & can charge any engine no matter what it's power requirements. Superior Design with Easy 5 Minute Installation Up to 300% More Charging Power & 300,000 Mile Life Expectancy 1 Year Unconditional Guarantee Precision Balanced for Smooth Operation