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High flow cats..worth it?

13K views 19 replies 6 participants last post by  maxst2 
#1 ·
Ive already have a magnaflow muffler and I was wondering if I would notice a difference if I installed magnaflow high flow cats? Has anyone had any problems using the magnaflow cats? Thanks.:)
 
#2 ·
I have one, other then the sound I did not notice anything. The only reason I went with one was because ordering a stock replacement from the dealer was gonna cost hundreds more for some reason.
 
#3 ·
Aftermarkets are usually less quality (less platinum and other expensive metals used to scrub exhaust)

You'll get more flow since there is less restriction... you'll notice more if you boost lol.
 
#4 ·
Instead of Magnaflow,I'm actually thinking about going with a pair of thunderbolt cats. Anybody here have them on their jeep?
 
#7 ·
When I had my Magnaflow system installed I asked about hi-flow cats. and the guy told me the new ones are already hi-flow, so no need to change them.
 
#9 ·
So I guess that switching to high flow cats wont make enough of a difference to warrant the cost? I only want to do this if the difference is noticeable,otherwise ill just leave the oem cats alone.
 
#10 ·
Don't think you'd notice much, if anything. I also have an 05 Hemi Magnum with hi-flow cats. and after they were installed I didn't notice any difference, but was assured that they were less restrictive.
 
#11 ·
nope.

You wont get much of the V6 with just bolt on's. You'll need to open the engine up and put in better cams, headwork, forged internals,etc.. then rig up a supercharger since your building it up. :D
 
#17 ·
I wish Chrysler put more effort into adding horsepower to the v6 instead of focusing more on the 4.7 v8 and 5.7 hemi (and also making you buy the v8 to get QT2 and QD2).:mad:
 
#12 ·
Oh, so they got sued then (the O2 emulator people)...Don't mess with the tree hugger political machine I guess :D I personally think removing emission components is silly these days (they don't restrict the performance like they once did and the fines are not worth it), so it does't affect me, but wow that is surprising.

As for aftermarket cats, the only reason I would buy them is because mine were out and to save some $$. If there were any increase in performance, that would be a bonus, but compared to a fully functioning oem unit, I doubt it. If you compare to a bad cat, yeah of course there'll be an increase (and where marketing really shines with their claims ;) ). However, if it's gonna cause a problem, then forget it.

btw, what if you were to wrap the exhaust up to the cat(s) to retain as much heat as possible? Maybe this would help the aftermarkets perform like they should (oem), better heating the catalyst (platinum). Don't know 100%, just thinking out loud.
 
#14 ·
btw, what if you were to wrap the exhaust up to the cat(s) to retain as much heat as possible? Maybe this would help the aftermarkets perform like they should (oem), better heating the catalyst (platinum). Don't know 100%, just thinking out loud.
What we do is use SparkPlug non-foulers. We stack two or three of them, put steel wool in the gap between them, and put the O2s in there. That reduces the flow enough that the ECU thinks the stock cats are still there and won't throw the codes.
 
#13 ·
I've been getting an o2 code every once in a while since I installed the magnaflow cat, but thankfully i can just turn it off with my tuner. It only lights up towards the end of long trips.
 
#18 ·
They didn't because the V6 is just there so they can say they have it. Kinda like the old 4 cylinder Wranglers and 4Runners. Almost nobody bought it. Its just for rentals and loaners. Economy was no better then the 4.7 or even the 5.7, and it makes way less power. No real purpose.

They had it on the shelf from the Liberty and Nitro, and it fit the GC, so they figured they'd throw it in for a few extra sales.
 
#19 ·
I cant imagine how a 4cyl Wk would be. I guess the v6 is a good basic engine, it seems simple to maintain and after a few add ons I.E intake, exhaust etc it makes it a little better. Ive done a few add ons to help with the power, I just don't want to install something that wont yield any results. Ive heard good things about porting the throttle body, I may have mine done shortly and call it good.:thumbsup:
 
#20 ·
IF you get a supercharger fitted for it.. I believe there are a few people on the boards here that would love to know what you did.lol
 
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