Does anybody know where I can get the Magnaflow highflow cat for cheaper then RRM offers it? I've done alittle searching but havn't been able to find any other vendors that list it.

 

get a universal one and get the flages welded on by a muffler shop should be alot cheaper

 

a legitamite muffler shop wont do it unless there are a certain number of miles on the car... however any speed shop shouldnt give a damn and would do it.

 

Technically they're not putting it on the car. Just tell them you want it for when you go to the track. There's no reason they should object to that, and it certainly isn't their fault if you put it on for road use.

 

good luck finding one cheaper... most muffler shops charge a lot more for mufflers and cats than aftermarket vendors. Hell, if you want to get cheap just do a test pipe and be done.

 

Already have a test pipe. I was just looking for alternative methods because it'll be about 150$ with shipping from RRM. I already asked Exhaust pros' and they said they said there's no such thing as a high flow cat, just bigger diameter pipes. The owner told me he can't sell me anything like that anyway uless they look at my car and verify that my orifinal cat is defective. That's all BS if you ask me. Oh well. I'm going to Mac Autosports today to get my tune and dynos done since my header has been installed. I'll post up the dyno sheet alittle later tonight. Oh ya it's my B-day today WOO HOO. I'm 22 now.

 

It's not BS. It's a federal crime to tamper with working cats- and I'm sure that guy isn't going to lose his business because you want to make 1 more HP up top.

 

Engineerboy what I ment was BS was the fact that he told me he couldn't sell me a cat becuase they have to test my old one and that he said there is no such thing as a high flow cat. Let's try and tell Magna flow that and HKS and all the other companies that make aftermarket exhaust.

 

i'd back the federal crime part... but the 1 hp comment is bogus.

Anyway, good luck finding a place to replace the cat... won't happen. You may find one that will make them but at that price??? Most want a lot more for the cats, a lot to weld it up, and a lot to install. It all adds up. Sometimes there are ways to save and sometimes you gotta bite the bullet and pay the money.

 

i agree about the high flow cat comment as well... he's obviously just trying to get you back out the door. A licensed service center will not be able to change it out or supply on though... it's agianst the law.

 

Happy birthday. $129 for a high flow is a freakin' GREAT price. Boe, you don't happen to know the ID on that thing, do you? Is it 2.25" or 2.5"? Buschur Racing also has one for $119 (I believe it's the same cat, just possibly different flanges). I'm guessing RRM's is a 2.25" which is more in line with the more common exhaust sizes, and Buschur's is on the large end of things at 2.5". Either one is a great buy, and I doubt you'll find anything comparable at a lower price.

http://www.buschurracing.com/cgi-bin....cgi?18X376545

 

I'm wanting to order that buschur high flow cat now, but am not sure about the flanges. Which ones will bolt up the the stock downpipe and exhaust flanges? THe RRM ones and/or the Buschur ones?

 

Magnaflow, HK$, etc can make the high flow cats as much as they want. They're not tampering with your working emissions controls. All I'm saying is a shop that wants to stay in business isn't going to be taking that chance.

As for the TP mod on its own, I have yet to see dyno figures that prove me wrong: 1-2 hp above 4.5K RPM and loss of torque. And I know that my daily driving and race performance improved once I reinstalled my catalytic..... maybe we'll just have to agree to disagree until someone presents a before and after andleave it at that.

 

The buscher isn't the same cat... infact i had one and it isn't a magnaflow at all. It was some other brand i'd never heard of. I didn't know they were 2.5 though... that seems overkill for an NA guy. Would be more for a turbo guy but then again i ran stock catback system to an axle back... i even had the stock downpipe. Just had the test pipe in there instead of the CAT.

I think the high compression of our motors combined with smaller bore makes a turbo spool quick and give great torque but is more suited for a 2.25 exhaust at max. The car likes a little back pressure and thus far the best combo's i've seen were out of 2.25... the drop in backpressure on the 2.5 systems is to much and tends to cause boost creep as well.

I believe the 4g63 motors like the big exhaust due to short stroke, lower compression, and bigger piston diameters. Though the motor is still a 2.0 it tends to have a lot more air density in the cylinders due to it's build thus making the bigger 2.5 and even 3" exhausts favorable. Also the cfm rate on it's turbo is higher.

Just my thoughts...

 

And we'll agree to agree on the 2.25" exhaust systems

For the original poster: there were a couple really good, really long discussions about exhaust system setup ealry last year or late 03. A search would yield a lot of good info.