Which 03/04 Cobra lowering spring is best for open course racing?
H&R Race?
Jimmy speaks the truth.
That said, H&R race springs are ok if you are going to run a street tire....something 140tw or harder.
H&R race springs are woefully inadequate for an 03-04 full weight Cobra on track rubber. They are too soft, and way too low.....even with MM urethane isos. Once you go to a sticky tire, you will be bottoming the suspension in high G turns, not to mention turns where there are pavement transitions on road course ovals.
I have posted this pic a few times on here. I'm sure the others are bored of it. This is HR Race springs on MM isos, and fresh V710's...