suggestions for a good high flow cat

[Z71_usmc_rebel]

what high flow cats are out there that are worth buying? also will a high flow mess with sensor readings? i have the 5.3L..

[omegafiler]

The stock cats already flow quite well for your average truck. Unless you've got some serious mods, like a Turbo, the stock cat works great. Otherwise Magnaflow/Carsound have some of the more popular aftermarket free flowing cats.

[tbplus10]

Like Omegafiler posted, the stock cats flow quite well.
Back in the early days factory cats were notorious for clogging and flow issues, over the years these problems have been resolved and if you were to compare High Flow cats against factory cats on a flow test bench you'd find there isnt much of a difference. Many big horse power engines are still running the factory cats.
Put your money in a cat back system or some other performance improvement like headers.

[Pete95Sierra]

high flow cats are not really worth it like tim said. put the money somewhere else and you'll get more power anyway

[Z71_usmc_rebel]

yeah i was thinkin of starting at the headers..but im not sure where i want to start just yet in the performance section..any recommendation on headers?

[Pete95Sierra]

i have flowtech on my truck cuz they were relatively cheap. headers are headers and the power difference between them is not going to be much between a $300 set vs a $500 set. just get them ceramic coated. i had mine for 4 months before they started to rust and the are not ceramic coated.

[tbplus10]

You need to do a little research on headers before choosing a set. Ceramic coating is a must for long life, but depending on the type performance your wanting you'll need to decide between long tube, short tube or intermediate, they all produce power in different RPM ranges. I probably wouldnt break the bank for a set of headers you should be able to buy a decent set in the $300-$500 range.
Pace Setter, and Jardan seem to be at the top of the $$ range while Hedman and Hooker are nearer the bottom.

[Z71_usmc_rebel]

awesome thanks for the help guys that will def. help me with a decision

[no0b123]

I say new headers and a cat back exhaust (mandrel bent piping in a larger diameter than stock).