oh, it definitely makes a 'feelable' difference! I still lost 2mpg towing my car on an open trailer regardless of what the numbers are and also picked up 10mph on the Road Atlanta esses and lots 7 on the big straight.
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NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z
Porsche: 93 968 / 23 Macan GTS / 93 968
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