Agree. Wheel to body gap is absolutely perfect all round the wheel arch in stock format, to me dropping it would ruin this unless you're thinking of changing rims.H&R are a well known brand, but I haven't heard of them in the Mustang modding scene before. I'm pretty sure I've got them on my BMW Z3.
As Hybrid said, a 1 inch drop seems standard across most lowering springs for the Mustang.
If you're an old guy, I'd wait and see how it looks straight out of the factory first! Having seen them in the flesh, the PP is nice!
Agreed, wouldn't bother if it was stock 19's. But as you said, changing to wider and bigger (20") wheels. Drop that shit pleaseAgree. Wheel to body gap is absolutely perfect all round the wheel arch in stock format, to me dropping it would ruin this unless you're thinking of changing rims.