The two MagnaFlow crossmember-back exhaust systems you referenced, parts # MF15893 and # MF15897, differ primarily in their cost and pipe diameter, as you noted. Both systems are 100-percent stainless-steel exhaust kits that include all hardware, straight-through mufflers and a true X crossover to balance airflow for improved power.
I would stick with the 2-1/2-inch diameter kit # MF15893 unless you have the 4 barrel carb and are using a high-performance air filter. Air intake and exhaust... view full answer...
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