Re: 4.0 v6 hp upgrades how do they?
With a M90 you can get around maybe 240RWHP on a stock 4.0 SOHC. If you want more you'll have to start messing with pulley sizes and re-tuning. The more boost you try to get out of this blower the hotter the intake charge becomes, and the less efficient the blower is. your injectors are to small IMO get at least 36# also a 190lph pump
Mods-K&N CAI , True Dual Flowmaster 40, BBK Ceramic Shorties, 3.73 , 25% UDP, 3/8 Phenolic Intake Spacer ,Steeda Tri-ax, SCT Chip/Dyno Tune
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