Does anybody (B&B, Corsa, Borla, etc.) make high performance cats for a C5? If so, can you please post a link to their web site?

Assuming that more than one manufacture does make a high performance cat for the C5, what do you all like best. The way my car is set up now (see signature), I really like the sound. Will changing to a high performance cat change the sound i.e.: make it louder. My guess is yes. Like everybody else on this forum, I'm just trying to squeeze a few extra ft. lbs. of torque and HP out of the LS1. Thanks.

 

Random Tech's best flowing cats only flow like 11% better than stock for LT1. Not sure if same for LS1, but probably so. I've been told don't bother with the aftermarket cats unless you're putting on headers and can't use the stockers anymore.


[Modified by Lone Ranger, 12:17 AM 6/2/2002]

 

Randon Technology makes some and you get aftermarket cats with the FLP system. Don't know if they are any better flowing than the stockers though :confused:

 

wERE FINDING THE FLP system to flow unreal comes witheverything but the exhast system sounds great with just the CATS BUT MAYBE SOME sTINGERS OR prt'S IF YOU HAVE THE CASH ON HAND.wE GOT IN ABOUT 25 UNITS ON A gp THWY ALL LEFT NEXT DAY WE MAYALREADY HAVE MORE IN STOCK HOT HEADERS THAT flow like crazy beatiful fit and finish looks hand made.Dave S.

 

davidmax..........Thanks for responding, but damn you message was hard to read. Yes, I know, this is a forum and not a grammar or typing class.

As a suggestion, copy your replies to word, run them through spell/grammar check, then paste the corrected version back into the reply box. Again, this is just a suggestion.

Well, anybody else have an input or experiences?

 

98-C5,

Having looked at your sig, I don't think you will gain but a few ponies with hi flow cats. I personally don't think it's worth the cost and install price. Plus, there is an issue with changing the original cats, on a road car where they are still functioning, is not legal. I know a lot of folks do it without a problem as they encounter 'damage' to them along the way;) but, it's just something to think about. On a modified head/cam car or a larger motor, you may see more gains with the hi flo cats.

I'd go the header route before I did the cats, though it is more expensive, you'd see much better gains.

Hope this helps.:)

RG

 

RG.........Thanks for your honest recommendation. It's not very often that a vender will tell you not to buy something that they sell. You, obviously, are truly interested in recommending what is best for the consumer and not just selling whatever the consumer will buy. Again, I appreciate your honesty.

Turning to the headers, yes, I do want a set of B&B shorties in a bad way. However, seeings how my car is Powerloaded (which I LOVE, by the way) and given Steve's medical problems, getting my Powerloader reprogrammed for the headers might be difficult. Once Steve is "up to speed," I'll consider ordering a set of shorties from you.

 

You can find Random Tech. product information at http://www.racesearch.com/gen_html/manuf/2141.html - I looked into it & decided it was not worth the effort ..

:cheers:

 

Everybody.........Thanks. Looks like you all just saved me $600.00!! :yesnod: :cheers:

 

Thanks for the kind words, but, really, most vendors here will tell you like it is. :) Setting the wrong expectation is where I think the boat is missed some times, so to speak.

We've supplied the random cats to some highly modified motor customers, but, haven't seen anyone report a very big gain from just those cats on a lightly modded motor with an intake and the like.

Shorties will net you some hp gains and also save you some weight. For example, the B&B's are 16 lbs lighter than the stock manifolds on the Z06. 16 pounds is a benefit to some degree.

I'll mention this as well, since you even thought about a cat change, how about a long tube header instead? Still keeping the original stock cats in place of course. You'd gain more in hp/tq so that the weight difference on a long versus short tube would be more than overturned by the power gains. Just a thought. Install is 2 hours @ $65-80 for the shorites. Figure 5-6 @$65-80 on a long tube, unless the shop has a flat rate on short and long tube headers for the C5.

If it's that you want bolt on, bolt off, lower weight with a worthy gain, then the B&B's in stainless are an attractive option.

If you want to give me a shout to talk about either, just call me.:)

RG




[Modified by RG in Dallas, 11:48 AM 6/2/2002]

 

Hi flow cats will not offer much of a gain unless you have major
mods( head and cam, nitrous, supercharger, big cubic inch motor).
If headers are a mod in the near future, we would recommend the FLP header system. These long tube headers come with hi-flow cats and off road pipes and also an x pipe. The system is complete from the headers to the exhaust flanges, they bolt up to any exhaust system you are using. Your stock manifolds, cats and intermediate pipe are removed completely w/ no cutting or modifying. You can always reinstall the stock stuff later if needed. FLPs system is completely jet hot coated for minimal heat transfer as well. If you are considering headers for more power, we would not suggest shorties. They produce almost no power and for the 900-1000.00 spent for shorties, its alot of money for little gain. Also, we would not recommend hi-flow cats by themselves for good gains, it will be a minimal gain at best. Yes, the FLP's are more expensive, but they will give you good gains. Fit and finish is the best we have seen so far.

Shorties will run apprx 950-1050, Random hi-flow cats will run 350-450.00. For that kind of money, you can have the best header system available that will give you the most gain available. Im not trying to make a sale here, I dont want you to spend on parts that will give you little gain for the buck...

Heres pics of the system I speak of:





Nate

 

high flow cats ?

give them ex-lax :lol: :crazy:

 

Got mine on order with ya nate. I hope they ship this week. I cant wait to get these on my car. I'll let you guys know my gains with them. Check my sig for the HP i got with only having a SLP loudmouth.

 

Hey Nate

How about another group purchase on the FLP's??

It sounds like some interest out here

:cheers: :cheers: :cheers:

 

Nate........Damn, those look cool!!! If it weren’t for you guys and my wife, I'd be retired.

Unfortunately, as I mentioned earlier, getting my Powerloader reprogrammed for the headers might be a PIA. Maybe this is a good thing? :confused: