Non legal per'se in the fact that it's illegal to remove a non damaged , functioning OEM cat by a lay person in all 50 states. This law does not take into consideration the effeciency of any aftermarket cat-converter replacement OEM equivlent or not.
To stay within the law in any state, an aftermarket CAT would have to be installed by a mechanic and he would have to attest that the CAT he removed did not meet current spec.

 

Does anyone have this running on a stock exhaust system? If so could you post up a clip of the sound? I would like to compare the difference it really makes to the tone.

 

I don't have any sound clips, but I can tell you there is very little sound difference with the Berk HFC and stock exhaust. I just put mine on last week.

 

Anybody paired a berk hfc with the hks hi-power dual? i have this exhaust and considering this hfc.. Wondering if it will sound raspy at all? Not looking for any rasp whatsoever..thanks!

 

I have it without heatshield/thermo isolator, and I dont really feel the difference.. it gets as hot as before (as far as I can tell). But the cat itself for sure runs hotter as before.. mainly because now the car runs a bit leaner (due to the extra re-tune)

Btw.. I have a EDM MY08 (F20C DBW) and after several thousands km I have got no CEL at all (I have it paired with a ASM 07 header, Tanabe Concept-G exhaust and everything is tuned with a EMU)

 

any update on getting cel for 06+ model?

 

looks like i will be adding this to the list of parts that i want!

 

03 w/ fujitsubo & berk hfc 60.5 mm....almost 6k miles.....no cel, great sound!

 

ya, berk's hfc is nice. 2 thumbs up.

mine's been rattling. the comb became loose from all the exhaust vibrations.

talked to bryan at berk, he said he'll give me 30% off for a new one since i am out of warranty.

they have excellent customer service.

 

paired berks hfc 70mm with Hks 75mm single. Sounds like a beast!