SleeperX

I am thinking of replacing my primary cats with racing cats. Who makes the best racing cats, and how much do they cost. Thanks

Grumpy666

Google is your friend.

http://www.randomtechnology.com/

vrus

Randomtech?? Nope... The ones I use are much higher flow and are cheaper too!!!

There are some people on here that bought them from me.. They can tell you about the quality.

My friend is the direct importer.. Retail price is: $279USD for the pair..

NewMoses

I put a pair of Random Technology race cats on my track car to pass smog. I kept them on because my dyno showed a small gain in low-end torque and no loss of power. I'm sold.

phatmitzu

More info on this Vrus?
Direct bolt on replacement? Power gains? Pictures?
I would like to replace my stockers to some highflow ones too...

Thanks.

ProjectC55

Metal cats: they use these on Ferraris. I have them on my AMG! The inside is also made out of stainless steel . Random Tech can't touch these.

http://www.jcwhitney.com/autoparts/B...14/TID-2043600

Grumpy666

Can you provide a link to these mystery cats where we can learn more about them?

Not wanting to be confrontive, but the true quality of a cat cannot be discerned from observation - that's just container construction quality. For a cat, the quality is internal - the types and amounts of oxides, precious metals, and ceramic/metal used in its construction. This is what determines the cost (other than the need for profit).

vrus

Chiromikey is using my race cats on his system.. I believe he posted pics of them in his thread. Ask him what his installer said about them when they were putting them on.

They have a tapered opening and the cans are measured at 4" or 5" at the widest point. The taper allows smooth airflow into and out of the cat.

Dont have any hard data on gains unfortunately because they were done in conjunction with other things..

vrus

Dont have a link.. I get them from a friend of mine who is the main importer for Canada. There is no online presence for his stuff.

He gave me the technical info once before.. I'll see if I can dig it up for you...

EDIT: The one thing I remember him saying is that they were APPROVED for use on OBDII cars which guarantees they wont throw CEL lights. They also have enough flow that they can replace a catalytic converter which is 4 - 5 times their physical size.

phatmitzu

Can you hook it up??

ProjectC55

Vrus I'm wondering if we're talking about the same cats? here is the company:

http://www.metalcat.com.au/

http://www.jcwhitney.com/autoparts/P...wflag-1#review


These are the best things out there!

Grumpy666

No doubt these are quality units, otherwise you wouldn't be using them on your car. The point I was trying to make is that there is a base price associated with a product such as a cat. In this case, that base price is determined by the costs of the platinumn, palladium, rhodium, oxides, and ceramics used in their construction. If someone is selling them for less, then they're either willing to accept less profit or are not including the same amount of materials. If it's the latter, then they will not function as efficiently and/or will require earlier replacement, since cats are consumables. In the end, you may be paying more for the increased flow and smaller size. But there are no free lunches, are there?

IMO, there are enough quality companies out there manufacturing cats for a long enough period of time so that the average prices have gravitated to a competitive level. If another company brings a product to market with substantially lower prices, I have to wonder how.

Ashkan's C43

vrus would your cats work in cali? would you need 2 of them to pass or just one? and what cell are they, 100, 200?

MB_Forever

Sorry to bring an old thread back to life, but I'm very interested in this topic and would like to know which company does manufacture the best race cats? I know of the usual suspects but wonder if anyone had experiences with them or has done a more detailed comparison between them in terms of quality, reliability, performance, etc....

- Random Technology
- Metal Cats
- HJS

Timeless

Am curious also...and was wondering if it would make any difference in the secondaries.

guysandiego

curious too -- less than $300 for a pair is unbelievable -- I would replace the secondaries and keep the 1st pair of cats stock --- I hear the secondaries are by far the more restrictive pair.... may help give a little sound too. what other benefits would this do for my car??? a little more top end?

TectiteK4E55

If anyone needs a pair of the Random 200 cell high flow cats I have 8 sets in stock, both 2.5" and 3". They really make a difference in sound and power too. My own E55 actually ran slower at the track with no cats, so I put a set of these on that I use for Shelby applications and picked up 2 tenths in the quarter. PM me if anyone wants a set. When these are gone, they will be more expensive to get than I have now.

Timeless

I assume you replaced the primaries with these to get the results...and .2 would equate to almost 20HP correct?

TectiteK4E55

My car already had the Kleemann headers with no primaries. When I removed my secondaires, I lost 2 tenths. With my hi-flows now in place of the secondaries, my car picked up the power I lost due to a little more backpressure which these engines apparently like a little of.

It is true, every 10HP can be .10 depending on conditions.

I am selling these cars in either 2.5" or 3" for $275 shipped per pair. I

I'm glad to not have the exhaust smeel too now that I have cats back on the car, it was worse than my Shelby!!!

c32AMG-DTM

I've heard excellent things about HJS, albeit secondhand.

Jspeed

Hi TectiteK4E55,

I also have the Kleeman headers but my cats were damaged and replaced by ****ty ones which throw CELs all the time. Are the Random ones better than the Kleeman ones? And which ones to use, 2.5 or 3", 100 cell or 200 cell?