I was thinking about getting a Warpspeed hi flow cat. Are these any good?

 

I don't know, but I'll let you know how my Budget HighFlow Cat is when I get it in a couple days...

 

Yea its good. Have it on.

 

From what I read, there shouldn't be any increase in hp(maybe 3hp), anyone correct me if I'm wrong.
Will it pass emitions?

 

I have no idea what emitions are.
Is it good in what sense DR-RIP? Power gains are minimal if any. Just hope that your exhaust temps are fine otherwise the cat will fall apart in days.

 

I just installed a warpspeed y pipe and budget hi flow cat yesterday, seems good so far, except for 2 things,

1. Before yesterday, my Greddy exhaust tip was right at the edge of the bumper, and now it sticks out 1.25 inches. I dont know if the ypipe is longer than stock or the cat, but the whole system is now longer.

2. Since the exhaust tip has moved, it touches the bumper. I dont know if putting the y pipe and hi flow cat on has increased the temperature of the exhaust tip, but now that it touches my bumper is melting onto the tip.

 

i have been thinking about getting it. As other said i have heard of no real gains form it. I need a new so why not get a cheaper high flow. The warpspeed is suppose to pass emissions, and it is one of the only ones that do.

 

Are you positive it will pass emissions?
I don't wanna have to take it off after some time. don't really have time for that between summer classes and work.

 

I have Warpspeed y-pipe, b-pipe, high-flow cat, and muffler. My car is registered in the NYC area, one of the toughest emissions in the country.

I have emmissions slips from the years before the new exhaust and the years after. There is not significant difference. Some years my numbers are LOWER than stock, some years they are slightly higher. All are well below the NYC air quality limits.

Just my two-cents. I hope that is helpful.

 

Also, check your former emissions numbers if you still have them. Are you borderline or way below. If you are way below then don't even think about it.

HOWEVER, just so you know, the high-flow cat will not yield any horsepower increase on a naturally aspirated maxima. not a measurable one, anyway. It's 90% y-pipe, 10% intake, b-pipe, muffler, and highflow cat combined!

 

Very interesting.

Here's what Warpspeed said in response to my questions about gains:

"What kind of dyno results would be achieved on a stock 1998 Maxima?

Does it increase the sound of the engine?"

18-20 depending upon the mileage and condition. Typically if you have a stock muffler and no intake you will not notice any sound difference, perhaps a little deeper tone. If you have an intake the intake noise will increase to a deep tone.

regards
Dallas

-------------

18-20hp? What was he thinking (or drinking)?

 

UT OH, will my Budget Cat pass CT Emmisions? That is with a Stillen Y-Pipe.

 

or smoking in that case. jezz 20hp!!????
I bet the thinks altezzas gives you 5hp

 

12-14 HP is probably a better estimate. Probably 15-16 HP with the full exhaust plus air intake.

Still, thats only $11 per horsepower (160 dollars/14HP)! Nothing else you do to your max will give you that much gain for your dollar.

 

yes i am positive
that high flo is not suppose to be as effective as others that i have heard(might be wrong) but not like they really do anything anyways.

 

They actually do quite a lot. If you were to remove the cat the emissions would skyrocket. Specifically they help remove carbon monoxide, VOCs and NOx molecules. They do this pretty well considering all of the chemical rxns that take place over the few moments that the exhaust gas passes through.

High flow cats from reputable companies should be as good as OEM. They wouldn't be able to sell them unless they passed pretty strict state and federal emissions specs.

The numbers from my emissions test did not increase with the new exhaust and new cat converter. They were actually slight lower than stock emissions the first year. About the same the second year. Probably not a significant difference statistically speaking.

Get a name branded product and it should be fine.

 

But, Budget is in Canada, I have USA emissions...

 

Is it a big name branded catalytic converter that is also sold in the US? Or is it some in-house product. I wouldn't trust an in-house one. I've been saying this from the start. Buy a well-known branded cat converter and you will be fine. No-name might work great, buy why risk it?

I have a carsound high-flow cat. It works great. My emissions are the same as before getting the new exhaust and well below NYC's tough emissions standards. If they aren't selling you a known branded product, say, "no way".

I got mine at warpspeed. A million other places sell them, too, though.

If you already bought it, well, good luck. Hopefully it will work out just fine.

 

Warpspeed sells Magnaflow high flow cats. My first one crapped out after 10,000 miles. As a naturally aspirated Maxima, you will not gain anything from running a high flow cat. Your car isn't producing enough waste gas to cause the cat to be an impediment. Boosted cars are a different animal altogether.

 

Sorry to hear that man. Usually a cat converter doesn't go bad "on it's own". Did something else happen, or did you just get really unlucky? If it was a bad part, that really sucks.

The only time I could see someone gaining from getting a new high-flow cat is if many of the pores on the old one have become clogged over many years of driving. Otherwise, keeping the stock should be fine and not lose you any measurable HP. This is more of a "placebo effect" purchase than a real HP gainer. I got mine with the new exhaust for a really cheap price, so I said "what the heck, why not?".

 

I got unlucky. Dave Sz had similar issues.