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Discussion Starter #1
have a 2005 f250 6.0 with stock 3.5 inch pipes i was wondering what you guys thought about cutting out muffler and going with spacer 3.5 inch pipe and adding a 5 inch tip.
 

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Thats what I have done with my 2006 f350 . It sounds great and egts dropped as well.
 

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Discussion Starter #3
on your f350 did you notice any power or fuel gain after you deleted muffler or was sound the only thing you noticed
 

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You'll get no noticeable power or fuel mileage gains when you delete the muffler, but you will see a quicker spool on your turbo with a muffler/cat delete.
 
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