catylitic converter flow

[IndianaVX]

sigh......just a queston, if anyone knows, but is there a certian amount of flow that needs to be taken into concideration when replacing the cats??
i will be more specific.....is there a specific amout (cubic feet per minute, for example) of exhaust that needs to be concidered when replacing the cats???
the dealer is saying he doesnt want to put a cat on there that may do damage because its too constrictive, or wont handle the exhaust flow. he is telling me that if the wrong cat is put on, i could bend valves, and tear up the engine.
so what im looking for, since i cant get it from him, are some numbers to ask some of these supplieers what the specs are on the cats they are selling. (does that make sense??)
its getting rediculas, really, it is....

thanks for the help, as always...........

[tom4bren]

I'm no expert but my humble opinion is that the less restriction on an exhaust, the better (that's why headers improve performance). I'd look for the highest flow cats that will fit in the space available.

Since I'm no expert I thank my lucky stars that there is a guy in my town that I trust. I'd never take any of my cars to a dealer for exhaust work (unless under warantee). This guy is a great welder and does nothing but exhaust even though he works at a tire shop. I'm only saying this to suggest that you get a second opinion from someone who knows what they are doing. Your mechanic seems focused on what can't be done rather than what should be done.

[IndianaVX]

Gulp....my mechanic IS the dealer, the cats are under warranty. and i think that warranty may be the problem, instead of the solution.

Ahhh, i remember the days i too had a mechanic that i trusted, that is till he started all this mess with my truck before the dealer got it....

thanks tom, i appreciate the reply..

[etlsport]

there IS point where too much flow will start to result in a loss of torque... i would try to PM Morgan-Tec about this, he knows the 3.5L very well and also knows his exhaust.. from my experience hes been very helpful about answering questions

[tom4bren]

ETL, I stand humbly corrected.

[VCrossfan]

If you PM Moran-Tec ask him if These's would work...