catylitic converter flow

[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...

[Kenny]

I would tell your "mechanic" to take a few lessons from pros and not be scared to ask other exhaust specialists the stuff they really don't know anything about. I mean, I hope they aren't installing the cats if this is the ignorance they are proclaiming to you - I'm picturing them installing the cats with a propane torch and pipe solder wondering why the pipe isn't getting hot enough...

Basically, get an "SUV" or "Truck" universal cat (or the Isuzu ones listed above by VCrrossfan) and you're fine, it'll be sized robust and larger pipe ends.

If you try and stick on a "car" universal cat with a 1.5" or smaller pipe end, then I'd be concerned...

Good luck man, and keep up the patience.

NOTE: high flow cats will increase exhaust volume, but probably not all that much with that monster stock Isuzu muffler...

[IndianaVX]

Thanks kenny,
well, i finally got some numbers, but i dont know what it means, and i may not matter anyway. the service manager said 3.5" pre converter, 1 pound exhaust back pressure on low side.........whatever.
so anyway, i asked today, what i need to look for, and the guy said they have decided to use the magnaflow cats that i had brought to their attention, and you, kenny, brought to my attention. but they couldnt find any anywhere. i called him back in under 10 minutes with a phone number, and a order number from a company, (i posted in the other cat thread) and made sure they were in stock, and they were. magnaflow 50000 series, same as yours kenny, but not all bling bling stainless.....lol....just black lookin.
so things may be looking up, i didnt get a call back, and was working too late toight to call him tonight.
Vehicrossfan, i havent called, but i saw ALOT of ads similar to that, and when caled, was told they dont have a listing.
im no gear head, but i had atleast heard of magnaflow before all this, so that means something.....lol
im not sure what brand that was you posted, but i would suppose they would work also.

thanks guys