The Sensa-a-traks are a poor product. Mine began to leak three weeks after install. They are always noisy when cold and are certainly not a performance strut. They are an economy strut for a passenger car, and nothing more. Even if they have a lifetime warranty, how many times do you want to keep changing your struts when they begin to leak?
Just a word of advice, spend the dough on KYBs or Tokicos. If you have a modified suspension, go with Tokico.
Plus, if you're going to be spending that much, go with Moog Cargo coils that are a bit lower than stock and KYB struts, wich are much more performance oriented than Monroe.
Moog coils (4): $150
KYB struts (4): $280
Both are available through Midwest. Wish I had done that for my SHO.
You'd save a bunch dough, too.