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 ?
No you dont, you do need to make sure the pipe isnt banging the rear leaf.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ford Powerstroke Diesel Forum
5.4M posts
265.8K members
Since 2005
A forum community dedicated to Ford F-series owners and enthusiasts with a Power Stroke diesel engine. Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more!