Performance nut
Well-Known Member
- Thread starter
- #31
Supposedly these are better for the environment (clean better than "performance cats") but flow as good as the performance cats. The intent is to have a header that doesn't throw a code which there are cases that they did not cause any codes. Mine would be one of those that wasn't so lucky.87 has more energy and burns faster, leaving less unburnt fuel... 93 burns slower and therefore may have more measurable unburnt fuel for the cats to deal with.
my question is whats the diff in the regular catted headers and "green cats"?
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