Just installed my Berk's HFC's over the weekend
My butt dyno is telling me yes and from what I've read somewhere ago the line they are suppose to add some hp and tq. We are talking about a stock G35 exhaust so you aren't going to get a "ghetto loud" lol
. WOT sounds a little "louder" than stock. Still has the stock note but its just amplified now and sounds mean. There is a big weight difference. Let's just say this, one stock cat weights about as much as both my Berk's did. No rasp what so ever as of now. There is a slight smell of raw gas but nothing like test pipes. Hope I answered all your questions. I added a picture so you can see the over all size difference.
. WOT sounds a little "louder" than stock. Still has the stock note but its just amplified now and sounds mean. There is a big weight difference. Let's just say this, one stock cat weights about as much as both my Berk's did. No rasp what so ever as of now. There is a slight smell of raw gas but nothing like test pipes. Hope I answered all your questions. I added a picture so you can see the over all size difference.
So, it's been a couple of months now since I installed my Berk's. I'm still happy with the results but I've noticed a lil rasp. It's only while revving the engine past 4000 rpms in neutral. Under load it can't be heard...atleast I don't take notice to it. Just thought I'd post this update as in my earlier posts I said there is no rasp. Thinking about maybe going with ART pipes later on down the road.
Alot of extensions, breaker bar, time, and patience's. I'd suggest to remove your whole intake to free up a lil more room to see also. Pretty simple job, just time consuming.
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Sounds like u r happy with the berk hfcs. My g is all Stillen dual exhaust sport rotors with front and rear sway bar with rear camber brace. I normally only buy stillen but they are not legal so it sounds like I'm gettn berk HFCs! Did u notice much of ann hp or torq gain. Th stillen exhaust gave me 16 hp. Hopn 2 get at least 6 horsepower from the HFCs!
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I have a 2005, sedan that I'm entertaining doing the same thing to, but am wondering is the gains worth the money? Or could i keep my OEM Cats, with the custom duals i have on the machine, drop some NKG plugs in her and have a Osiris flash tune? Do you have State Inspections? You think it will pass inspections with the new addition?
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From: Tucson, AZ
no idea...youll notice it on a lot of youtube videos if you listen closely..
I think Berk used to offer both ceramic & metallic cats. I had the metallic ones on my old G and basically had the same experience as the op.
I used them with stock exhaust, ztube plenum spacer etc then upgraded to Fast Intentions TD and later Invidia Gemini TD exhausts. Best HFCs out there IMO...no smell no CEL... just lighter cats & a few extra whp
I used them with stock exhaust, ztube plenum spacer etc then upgraded to Fast Intentions TD and later Invidia Gemini TD exhausts. Best HFCs out there IMO...no smell no CEL... just lighter cats & a few extra whp
That's how all hfcs are. If you don't like the sound, switch to resonated test pipes or art pipes