devenfx4

i want some high flow cats to make my exhaust louder( i have true duels with flowmaster 40 series mufflers) want i wanted to know was what is the onlet outlet diameter i need and also what brands would you reccomend and also which would be best??? thanks all

devenfx4

no body...

devenfx4

anyone at all have any information....

panda_king

Check out the F150 exhaust thread stickied over on F150Online. Most prefer the Magnaflow high flow universal cats.

otto457

Do a search and you'll find 2.5" is the diameter and Magnaflow 94106 or 94136 is the cats used most often.

devenfx4

Magnaflow 54306

has anyone used or heard or used? i know everyone uses the magnaflow 9 series one yet this one says high flow and the other doesnt.. id like to know because one of mine is clogged now due to an injector being stuck open..

otto457

The 54306 is too small of diameter and tends to go bad when exposed to the heat a larger displacement motor will make. There really is no "high flow" converter vs. a normal converter anyways, they all flow well enough to not be a restriction. Plus 9 series are cheaper.

devenfx4

is says 2.5 inch inlet and outlet or am i missing something??

otto457

Look at the casing size and area of actual catalytic function. Inlet/outlet diameters don't mean anything.

devenfx4

need some clarification.. how come i keep reading tha everyone has a pre cat then the reg cat... i only have 1 cat per bank...