After reading many posts and Manufacturers claims . I realize that if I want to stick 87 octane gas that a Superchip won't help much . Does anyone out there have any experiences of Hi-Per mods using only 87 octane gas ? Will anything on the market really help ? If so , how much improvement can be expected ?

 

OOps , I should have included my Screw specs.
'01 5.4L White XLT
4x4 Off-Road 17 in. Al.wheels
Tow Package
Snug top shell

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2001 S-Crew 4x4 White 5.4L XLT Off Road & Tow Package 17 in. Aluminum wheels Snugtop Shell