Got the full NHP permance kit on mine, 200cell cats.
(^performance, hmm)
Wrapped from the headers all the way down to the twin mufflers. Not only it lowers the temp in the bay, it also did cancelled drone by 15~25% for sure. Still sounds amazing though... and couldn't think for a minute to cancel it all. Part of the fun
... or maybe not for someone who DD on a slow highway for 50~75 miles/day. Could be different in that case
That wrap was pretty thick. If my memory is good it was a good 3~4mm thick.
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'97 Boxster base model 2.5L, Guards Red/Tan leather, with a new but old Alpine am/fm radio.
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