and you guys tell me if i should lay of the glue
I want to replace the exhaust on my 2002 F150 with the 4.6. I am thinking of replacing the y-pipe with a Magnaflow (2) 2 1/2" into (1) 2 1/2" outlet into a Magnaflow si/do system. Do you think i will lose any low end torque by replacing the y-pipe or should i be ok? I did use the search engine, b.t.w., but if i missed something, feel free to bash away and point me in the right direction. Just want something efficient and more power than i have. I currently have an Airraid intake and am looking at a power programmer in the future. That will probably be the extent of my mods.

Thanks guys...

 

Just getting rid of the factory Y-pipe helps everything. I went with dual
2 1/2" pipes into a DI/SO Flowmaster with 3" tailpipe. No loss of bottom end.