The 94.5-97 PSDs had a straight-through 3.5" muffler. There is very little benefit besides sound by going larger on those or deleting the muffler. Installing a 3" turbocharger downpipe is a necessity though!
On the 99-03 PSDs, the muffler is a maze of baffles and flow redirectors. By "losing" the factory muffler on those trucks, besides being a lot louder, they can see a benefit in breathing and power.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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Wed, July 21st, 2010, 12:39 PM
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