[Shaolin Crane]

Originally Posted by Vettezuki

...but likewise, for optimal handling on street conditions, it can never be the same as an IRS.

Fixed. Its been proven time and again on a prepped track the 3 link performs every bit as well as an IRS. The IRS gets the obvious advantage on unprepped streets.

[fiveohwblow]

I was just about say that Guy, then I saw your post. Fwiw, I love stock IRS and have driven many IRS cars, but have not driven any with 3 link so all my info is second hand.

[Vettezuki]

Originally Posted by funmom56

I'm missing HP, 2010 shelgy gt500 5.4L engine, with upgraded 2.3L TVS supercharger produces 660HP @15 poundes of boost, 2013 has 5.8L engine with 2.3L TVS supercharger and only produces 650HP @15 poundes of boost, so where is the extra HP 400cc should produce, guess the car is detuned???

Without looking at it more closely, the difference is simply that what comes from Ford as the manufacturer has to meet warranty/durability requirements. That flies out the window as soon as you modify your own car, so you can push harder with more risk and less durability.