The "350HP" is the next step up the ladder to more performance out of your 4.0 based Jeep/AMC motor. This combo features a more aggressive cam profile to give that "Lopey/Rowdy" idle quality with a redline of 6,000 rpm's.
The "350HP" features the following upgrades from its "300HP" counter part: Baffled oil pan Competition cylinder head, Full roller 1.7 adjustable rockers(Newcomer) w/required Billet valve cover spacer kit, HD 3/8" .080" wall custom length pushrods, and a more aggressive cam profile to give a really strong mid range and top end all the way to 6,000rpm's without sacrificing to much bottom end power. ***Recommendations for upgrades- Walbro 255 fuel pump, 24-36lb injectors, upgraded header w/2.5" collector and exhaust minimum!, intake porting, bigger throttle body, upgraded radiator, upgraded motor mounts(Drivers side mount that bolts on the block MUST have increased bolt count over the factory three bolts to keep from breaking block from added power, passenger can stay stock), cold air intake and last once everything is upgraded have it properly custom tuned then everything and everyone is happy. Every motor is dynoed with a video and power numbers, 12 month/12,000 mile warranty and complimentary Newcomer racing T or Sweat shirt w/hat. All engines will be shipped bare unless paint our custom high quality monotone paint option is applied from the options list. ***As of 12/01/21 all "350HP's or anything turning over 5,500 rpm's will be required to get an ATI damper due to engine speed on the dyno for our and your safety.