question about catalytic converters

VPStang · May 11, 2010

whats the difference between regular cats on magnaflow catted X and the magnaflow catted x with SPUN metal cats?

Are the catalytic converters stock from ford considered high flow or are they restrictive? Would I benefit in sound or performance by replacing them with high flow cats?(spun or non-spun)

SpartaPerformance · May 11, 2010

Factory cats are high flow therefore it's not worth replacing unless they are damaged.

gmantheman · May 11, 2010

The less expensive magnaflow catted x has ceramic substrate cats and the more expensive x-pipe has the metalic substrate.

gmantheman · May 11, 2010

SpartaPerformance said:
Factory cats are high flow therefore it's not worth replacing unless they are damaged.

The factor cats do flow well but are not true hi-flow cats. There is a substantial size difference. Both my magnflow and pypes cats are about 1/2 the size of the factory cats. Aftermarket hi-flow cats will be louder. The sound or volume level will be between the factory cat and an o/r set-up.

SpartaPerformance · May 11, 2010

They are high flow and and replacement is not needed unless they're damaged. There are plenty of vehicle running big power numbers with factory cats. If louder sound is the goal then fine but I still can't see that to justify the expense.

gmantheman · May 11, 2010

SpartaPerformance said:
They are high flow and and replacement is not needed unless they're damaged. There are plenty of vehicle running big power numbers with factory cats. If louder sound is the goal then fine but I still can't see that to justify the expense.

I agree I wouldn't replace the factory cats with hi-flow cats, but the OP was asking about the two different catted x-pipes. Replacing the factory catted h with an x-pipe with hi-flow cats will change the sound and I think that's what the OP wants.

VPStang · May 11, 2010

i want some more volume, and i'm considering welding in new cats. I would like to know the difference between the 2 types of catalytic converters that magnaflow offers.

VPStang · May 11, 2010

care to elaborate in laymans terms??
how would ceramic differ from metallic other than heat insulation?

gmantheman said:
The less expensive magnaflow catted x has ceramic substrate cats and the more expensive x-pipe has the metalic substrate.

gmantheman · May 11, 2010

VPStang said:
care to elaborate in laymans terms??
how would ceramic differ from metallic other than heat insulation?

Metalic is supposed to flow better and be more durable than the ceramic.

VPStang · May 11, 2010

interesting....Do you know if Magnaflow still uses Catco catalytic converters?
If I can get some decent prices, I might have some welded in-if i can find the Catco equivalent. Would this effect my warranty? Any other input is appreciated....

gmantheman said:
Metalic is supposed to flow better and be more durable than the ceramic.

gmantheman · May 11, 2010

VPStang said:
interesting....Do you know if Magnaflow still uses Catco catalytic converters?
If I can get some decent prices, I might have some welded in-if i can find the Catco equivalent. Would this effect my warranty? Any other input is appreciated....

I am pretty sure they use their own cats. When I had an o/r prochamber, I had magnflow cats welded in. The price for parts and labor was $320. I am a little confused on what you are doing? Are you replacing your factory cats with hi-flows or buying an o/r midpipe (h, x or prochamber) and then having hi-flow cats welded in?

VPStang · May 11, 2010

i'm looking to get high flow cats welded into my stock h pipe.

gmantheman said:
I am pretty sure they use their own cats. When I had an o/r prochamber, I had magnflow cats welded in. The price for parts and labor was $320. I am a little confused on what you are doing? Are you replacing your factory cats with hi-flows or buying an o/r midpipe (h, x or prochamber) and then having hi-flow cats welded in?

mustangdave · May 12, 2010

You cannot LEGALLY replace them unless they are defective under Federal law. One type. Is recommended for blowers but I'm not sure which one.

gmantheman · May 12, 2010

mustangdave said:
You cannot LEGALLY replace them unless they are defective under Federal law. One type. Is recommended for blowers but I'm not sure which one.

That's a good point. VPSTANG could buy an o/r midpipe and have hi-flows welded in.

Sparty92 · May 12, 2010

mustangdave said:
You cannot LEGALLY replace them unless they are defective under Federal law. One type. Is recommended for blowers but I'm not sure which one.

In a state where emissions testing is not conducted, how in the heck would they even know what you had on your car, unless you had NO cats and a stinky car? Then the cop that pulled you over might peek underneath and see no cats. But if you had new hi-flo cats...he wouldn't do anything about it?

gmantheman · May 12, 2010

I am not sure but even if the states emmisions requirments are lenient I bet exhaust/muffler shops will not replace the factory cats with hi-flow cats. If the car has hi-flows you should be okay except here in Cali. Hi-flow cats are 49 state legal.

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