I am looking to replace my exhaust system with an IMCO custom dual setup, I do not have my truck with me at the moment, but want to get everything ordered. I have a 2005 SuperCrew FX4 5.4l. I was wondering what size is the "IN" on the cat side? If anyone can help, it would be greatly appreciated.

 

I’m pretty sure it’s 2 ½” in & 2 ½” out but not absolutely positive about that.

 

Thanks. So is everyone with the IMCO exhausts going with the 2.5" IN and dual 2.25" out or are they putting in a coupler and doing the 3" IN and dual 2.5" out? I want to order this ASAP. Any help is appreciated.

 

I got my SI/DO IMCO extreme today and will have the custom run duals out the back tomorrow. Will try to get a soundclip when i am done....if anyone cares.