Area of 2.75" ID pipe= 5.94 inches squared

Area of 3.5" ID pipe= 9.62 inches squared

Difference is 3.98 square inches

3.98/5.94 = 67% larger area

Say the 2.75" maf was good to 350whp

350 X .67 = 234

So the mafs hp capability is increased 234whp bringing the total to 584whp

Area of 3.5" ID pipe= 9.62 inches squared

Difference is 3.98 square inches

3.98/5.94 = 67% larger area

Say the 2.75" maf was good to 350whp

350 X .67 = 234

So the mafs hp capability is increased 234whp bringing the total to 584whp