What do I need to know about when upgrading my Catalytic Converter?
#1
Registered User
Thread Starter
What do I need to know about when upgrading my Catalytic Converter?
I am thinking of upgrading my cats, but I'm not sure which ones are best or if it is a matter of personal preference. I know I want to see some type of gain but at the same time it seems like there are too many to choose from. What do I need to know and which would you recommend and why?
More specifically, I am looking at HFC's.
More specifically, I am looking at HFC's.
Last edited by ScottyBeGood; 09-12-2010 at 10:06 AM.
#2
Registered Member
iTrader: (7)
really you only have 3 choices...High Flow Cats (HFC), Test Pipes (TP), or long tube headers (LTH).
IMO HFC is the best way to go. You can still get good gains from them, and don't have to worry about throwing a CEL. With TP, you might see a slightly higher gain, but you have to worry about CEL, smell, emissions, all that. And LTH I don't know much about but I do know several people who had them and removed them because they just weren't worth it.
IMO HFC is the best way to go. You can still get good gains from them, and don't have to worry about throwing a CEL. With TP, you might see a slightly higher gain, but you have to worry about CEL, smell, emissions, all that. And LTH I don't know much about but I do know several people who had them and removed them because they just weren't worth it.
#3
Registered User
Thread Starter
really you only have 3 choices...High Flow Cats (HFC), Test Pipes (TP), or long tube headers (LTH).
IMO HFC is the best way to go. You can still get good gains from them, and don't have to worry about throwing a CEL. With TP, you might see a slightly higher gain, but you have to worry about CEL, smell, emissions, all that. And LTH I don't know much about but I do know several people who had them and removed them because they just weren't worth it.
IMO HFC is the best way to go. You can still get good gains from them, and don't have to worry about throwing a CEL. With TP, you might see a slightly higher gain, but you have to worry about CEL, smell, emissions, all that. And LTH I don't know much about but I do know several people who had them and removed them because they just weren't worth it.
#4
Registered Member
iTrader: (7)
as long as you go with a reputable brand, you should be fine. I personally have Berk HFC and love them. I can't say if they are truly better/worse than any other brand simply because I've never used any other.
But with anything, as long as you get a well known, quality brand it shouldn't matter
But with anything, as long as you get a well known, quality brand it shouldn't matter
#6
Stillen is another name you can look into.
#7
Registered Member
iTrader: (7)
IMO HFC's are slightly (and I mean VERY slightly) noisier in cabin, but absolutely nothing overwhelming in any way. And yes, you do basically sit right on top of them, but that really wouldn't make a difference in terms of noise unless there was a HUGE noise difference
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#8
I think I read that Motordyne's ART pipes for the 350Z also fit G37/370Z as well.
Advanced Resonance Tuning (ART Pipes) MotorDyne Engineering
Advanced Resonance Tuning (ART Pipes) MotorDyne Engineering
#11
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I'd get it if labor didn't cost so much.
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#13
Lexus Defector
iTrader: (60)
The basics of what you need to know are that HFC tend to give a louder and raspier sound to any exhaust including stock. Some may cause more prominent exhaust smell. The install tends to be a bit of a PITA due to the bolts holding the stock cats to the exhaust manifold being quite difficult for most, plenty of penetrating lubricant, time to work in, and elbow grease (preferably impact tools) make it easier. There are some slight gains to be had at the top of the torque curve, not so much down low.
#14
Registered Member
iTrader: (5)
I would take your car to a shop for the install. Two of the bolts (one bolt on each side) are extremely difficult to remove.
#15
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Thread Starter