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Answer:
YES, a better performing engine uses fuel more efficiently, if driving conditions and tendencies are similar. However, it is not a guarantee. Our mufflers were designed as performance mufflers. *MagnaFlow's diesel exhaust for trucks will see the biggest gains due to our systems' dropping EGT's over 150 degrees.
Additional Info Regarding MagnaFlow Performance Exhaust:
Wide Open Performance
Diesel Systems
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