I have a K&N Typhoon cai, the kinetix V+ plenum, and the HKS knockoff exhaust. I'm wanting to a tune from Uprev...ive read that i could be looking at a good 25-30 horses after the tune. But what i was wondering is what kind of difference would high flow cats make on my setup? Ive been considering them for quite some time. would they be worth the money before the tune? These will be the only performance upgrades i will be doing to the car for quite some time.

Any input would be appreciated

 

Yes

Get the HFC's then a tune.. Well worth it..

 

get all your breathing mods done before you get a tune.

 

yes.. the HFCs usually make you run a bit leaner (as does the plenum you have). Get them and get tuned as soon as you can afterwards.

 

ok thanks for quick answers! ive searched...and there is so much debate on HFC's. Which brand would you recommend? And is it a better idea than resonated pipes? I dont mind it a bit louder...I just don't want that drone at high speeds.

 

In a nutshell...

For NA applications, testpipes & HFC's end up with about the same power output.

Testpipes = cheaper
HFC's = more $ but quieter and no burn marks on your rear bumper cover

If you choose testpipes, resonated or not, you will hear it drone on the highway.

Fast Intentions and Berk seem to be good choices for HFC's. I've had the FI's and they were fine, but a bit pricey.

And good choice with UpRev.

 

Thank you! should i be worried buying used HFC's?

 

It can be hit or miss I guess.

 

Fast Intentions! Fast Intentions!

 

I first got CrawfordZ high-flow cats, and blew them out. Then I went with Berk high-flow cats, and I got the metallic ones so they would last on the track. Unfortunately, they didn't last on the track, they blew out. (whole thread here), so I ended up getting kinetix resonated test pipes. The sound of these test pipes is as good or better than the high-flow cats, to me.

If you drive on the street, high-flow cats will probably be ok. If you drive fairly aggressively on the track, I would (and did) go with test pipes.

 

So did the kinetix resonated pipes create an annoying drone on the highway?

 

Yes. Mine fell apart inside. You could never tell by looking or shaking them. I put them in the trash instead of scamming another member. Some sellers are not so responsible.

 

berk high flows cats, and come on u really need to ask this question, its a given

 

Not that I noticed, but I didn't notice it with the HFCs either. Also that may be a function of the exhaust (muffler) as much as the cats/test pipes. My exhaust is a fujitsubo titanium. I think I remember having what might be a "drone" with my stillen true dual but that was a few years ago.

Here's what I did with mine - gave them away for free:
http://austin.craigslist.org/pts/1173405384.html

 

hmmm...i might go with Kinetix...i like the price. But both the high flow cats and the resonated pipes are the same price...

 

The answer is yes, but why not TP?

 

I just don't want that raspiness between 3-4K that i've heard out of test pipes. I got rid of my last exhaust beacuse of that also. I'm trying to keep the sound as smooth as possible

 

In that case you are on the right track. And yes, I would do HF and then tune after you have all your power mods install.

*I do have a bit of rasp untill the car gets warmed up, however that does not bother me.

 

has anyone had any experience with the kinetix high flow cats?

http://conceptzperformance.com/Cart/...ion.php?II=888

 

there isnt very much info here on kinetix pipes...cant decide on the HFCs or the resonated pipes...