This 370-amp alternator (conservatively rated, its a bit more) for Jeep Wrangler 3.6L engines will provide a massive increase in amperage output vs. the stock small case 160-amp alternator. We use pure copper, oversize diode rectifiers for outstanding durability at this output level. A higher output alternator will provide more electrical support for aftermarket accessories such as light bars, winches, coolers, air compressors, inverters, large stereos, and more! Even if not UPGRADING this makes a great OEM replacement for a worn out or tired alternator.

This LARGE case style offering provides appx. 190 amps at just vehicle idle speed which is extremely useful in heavy winching situations for off-road vehicles. This application is a factory style reverse mount installation which requires the proper reverse rotation rotor to keep the alternator as cool as possible just like the factory intended. Beware of other offerings that DO NOT use this rotor as it creates a 30% loss in cooling that can result in premature failure, especially in non-moving vehicle usage. Using the reverse rotation rotor also ensures your pulley stays tight due to the reverse threads. Not using a reverse threaded rotor can result in catastrophic failure due to the pulley nut backing off under shifting or hard acceleration.

While our 250-amp large case option is a great all-around performer, the 370+ amp option will unleash the maximum amount of power needed for huge audio systems and the biggest of winches in the higher/driving RPM's. Be sure to add upgraded OFC (Oxygen Free Copper) 0-gauge wire when choosing this alternator for maximum performance and durability. We recommend one 0-gauge power and one 0-gauge ground cable coming from the alternator going directly to the battery. OFC type cabling is best due to its high current transfer ability and its resistance to corrosion from outside elements such as mud/water/temperature.

This high output 370-amp offering will use our smaller 1.75" pulley (updated pictures coming soon!) and will REQUIRE the use of a shorter belt. No worries about guessing belt sizes, we've got the size figured out for you here with a high-quality Gates brand K060870HD This is a "green" or "Fleet runner" style belt that is made for harsh environments such as dirt, mud and most chemical spills under the hood. A standard NON-HD belt can be used if desired (K060870), but we recommend the HD style belt due to it just being more durable in the long run.