The car should do better than 24 for sure. Check the exhaust. They have a habit or rusting out and falling apart. It radically reduces FE for some reason, if it happens right next to the muffler. Anywhere else and you won't notice but right there it has an effect. I think the way the under belly turns its creates a high pressure zone opposed to a low pressure one that exists at the rear(forcing exhaust out rather than it being sucked out).
I went from like 26 to 33 with just that. Went for lighter weight tires and wheels and now I am looking at Trans fd swap because I'm going to replace my clucth with a lightweight high performance clutch that I picked off a car that came through and the guy insisted on replacing it with a stock one. . .:rollseyes:
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