I think the idea behind it is if you crack the block, the girdle saves your rotating assembly, which steel would be better than. Aluminum would not hold up. I'm putting a steel one on mine because I do not completely believe in the "absorb" theory and I'm more worried about my rotating assembly. ~Brian
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1989 Black Mustang GT Hatchback, Underdrive Pulles, Electric Fan, Cold Air Intake, Headers, Offroad H-Pipe, Magnaflow catback, Steeda Tri-Ax, Fluidyne Aluminum Radiator, Timing at 14*, 3.73's
Coming not so soon: 408w
Ricer Hater's Club Member #59
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