does anyone have hi flow cats i was looking into them but idk need some opinions

 

search it

 

I am looking for some myself man... I was thinking a Christmas gift to myself.

Anyway, here are a couple of the links I have been looking out. This might help you out with your choice. Top choices from what I have seen ate Fast Intensions, Crawfords and Kenetix(cheapest I believe)

From what i have been reading FAST INTENSIONS are what I might go with. I havent heard anything bad about them yet.

Anyway, good luck. Lemme know what you choose.


THESE LINKS SHOULD SHOULD HELP OUT..... Most are about HFC's and test pipes

https://g35driver.com/forums/showthr...high+flow+cats

https://g35driver.com/forums/showthr...high+flow+cats

https://g35driver.com/forums/showthr...high+flow+cats

https://g35driver.com/forums/showthr...high+flow+cats

https://g35driver.com/forums/showthr...high+flow+cats

https://g35driver.com/forums/showthr...high+flow+cats

https://g35driver.com/forums/showthr...high+flow+cats

https://g35driver.com/forums/showthr...high+flow+cats

https://g35driver.com/forums/showthr...high+flow+cats

 

I Heard they dont add S*it to your HP #'s
Same thing I heard about the headers.

 

To really benefit from opening exhaust restrictions, you would have to go FI. Only option I would invest in would be their exhaust; sounds sexy & will give you a few ponies with it.

 

they dont add ****??!? na ah!


I put my HF cats in the other week - they make a big difference...BIG difference especially on the highway. takes a few days before it breaks in tho

 

neal's car sounds nice w/ hi flo cats

 

Well performance wise you need backpressure when you have a N/A car. Mainly for the torque in the low to midrange powerband. Of course you are gonna feel the difference tho on the high end, namely on highways, because the car is just free dumping exhaust fumes as fast as it can to keep up. I personally dont need them until my car gets supercharged. Then they will make a big difference on my coupe throughout the whole powerband range. With FI you need to just have an open flow exhaust all the time because the turbo/super is doing all the spool work for you. Butttt no doubt hi-flow cats sound nice as hell!

 

well its what I "heard"....could be wrong...but you'd know better than me Neal

However my car dynoed the same numbers as Steve and he had test pipes...so I dont know

 

I got random tech hf cats cuz they got oem mounting brackets.... I had kinetix and the would rattle so much...
98intrigue said he "had Crawford high-flow cats with the HKS to begin with. Then I traded the cats for the FI test pipes. Now I'm going back to the Crawfords. I couldn't take the rasp and the gas smell of the test pipes. I dynoed with the cats then immediately dynoed with the test pipes. I gained 1rwhp...not worth it at all! It just goes to show how well the Crawford high-flow cats really flow."



Here's a pic of the cats i got...

 

yes sir - thats why I am sticking with my stock exhaust...I believe having a cat back with the cats will be overkill....plus the OEM exhaust sounds nice enough.

right now I am searching for a 05 Sedan midpipe. My cheap/small aftermarket midpipe rasps.

It is also important to note that the F/I Cats do not have the OEM mounting brackets.

 

me and vance dynoed on the same day at the same dyno only about 20 mins apart

he had intake/exhaust, i had intake/exhaust, headers, and high flow cats. our cars turned identical numbers

not saying that this is the end-all-be-all regarding high flow cats, just food for thought