just picked these babies up from my local GM dealer...seems the GTO is shipped with red polyurethane spring blocks(6 in by 1.5/1.5) i to keep them from moving in transit these cover three coils...a long u channel at the top a notch in the center and another u channel but short at the bottom...these were a bitch to squeeze in but they work...as it was if i went from a 20-30 roll wot at 5K the tires would break loose then bark lightly into 2nd....now they stay hooked and bark loudly into 2nd

 

how does it ride? rough?

 

no not bad at all...i was surprised...but whnei make my custom ones theyll swap in and out easily