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5" exaust with tuner

575 views 2 replies 3 participants last post by  Heavy_GD 
#1 ·
So I put a 5" exaust with a 4" down pipe and I deleted the cat . I run an SCT tuner with the economy tune . Do I need to re-program since I deleted the cat ?
 
#2 ·
The 6.0 has no sensors in the exhaust to tell if the cat is there or not.
 
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