ILUVUNICORNS Posted October 7, 2019 Share Posted October 7, 2019 Howdy So my 370z has a full Cobra Cat-Back exhaust with Cobra Decats. From 4k revs, it sounds so crap. Just noise and not even a nice noise at that. Really tinny.... Redlining, it sounds nice enough but I hardly do that. If i sell the Decats, what can I replace them with, that quietens the car down to a sensible level? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
Ekona Posted October 7, 2019 Share Posted October 7, 2019 Standard cats will do the job. Quote Link to comment Share on other sites More sharing options...
davey_83 Posted October 7, 2019 Share Posted October 7, 2019 (edited) These from what I gather Motordyne ART pipes are the best sounding cat replacement pipes, not cheap but A1 quality and the best note. I've recently fitted a pair to my 350z and sounds amazing, believe it or not less rasp than with OE cats and Zero drone. https://www.tarmacsportz.co.uk/nissan/nissan-350z/motordyne-nissan-370z-advanced-resonance-tuning-art-test-pipes.html Edited October 23, 2019 by davey_83 1 Quote Link to comment Share on other sites More sharing options...
nissanman312 Posted October 7, 2019 Share Posted October 7, 2019 1 hour ago, ILUVUNICORNS said: Howdy So my 370z has a full Cobra Cat-Back exhaust with Cobra Decats. From 4k revs, it sounds so crap. Just noise and not even a nice noise at that. Really tinny.... Redlining, it sounds nice enough but I hardly do that. If i sell the Decats, what can I replace them with, that quietens the car down to a sensible level? Thanks in advance. I have been in this exact position I sold the cobra and had the invidia Gemini it was perfect with decats For a couple of years then it got louder and louder as the silencers got old I ended up getting extra silencers welded in it further back and its spot on again I needed to keep my decats because of my charger but if you dont need the flow I'd stick stock cats back in 1 Quote Link to comment Share on other sites More sharing options...
ILUVUNICORNS Posted October 22, 2019 Author Share Posted October 22, 2019 On 07/10/2019 at 06:38, Ekona said: Standard cats will do the job. I can’t seem to find any prices of these online? Do you know roughly, on the off chance? Quote Link to comment Share on other sites More sharing options...
ILUVUNICORNS Posted October 22, 2019 Author Share Posted October 22, 2019 Hi All So no one is buying my car so that means I just need to spend more money on it lol So my options and I don’t know the answers really for any of them. 1. standard cats back in, so I will have to buy some more. 2. Japspeed HFCs have been recommended to me but will HFCs still make it too loud? 3. most expensive - sell the cobra system and buy Invidia system. Quote Link to comment Share on other sites More sharing options...
Jack94 Posted October 22, 2019 Share Posted October 22, 2019 (edited) 1. Try and find some second hand either on here or somewhere else, I dread to think how much nissan charge for them new 2. Don't listen to whoever reccomended that to you, japspeed are renowned for their poor quality. If you're going for HFCs go for a better quality brand, they'll be quieter than decats but louder than oem cats. 3. Yes the invidia will be quieter than the cobra but still might be too loud for your taste with the decats, probably a good idea to see if there's anyone local to you with a similar setup and go for a listen first. Edited October 22, 2019 by Jack94 Quote Link to comment Share on other sites More sharing options...
ILUVUNICORNS Posted October 23, 2019 Author Share Posted October 23, 2019 11 hours ago, Jack94 said: 1. Try and find some second hand either on here or somewhere else, I dread to think how much nissan charge for them new 2. Don't listen to whoever reccomended that to you, japspeed are renowned for their poor quality. If you're going for HFCs go for a better quality brand, they'll be quieter than decats but louder than oem cats. 3. Yes the invidia will be quieter than the cobra but still might be too loud for your taste with the decats, probably a good idea to see if there's anyone local to you with a similar setup and go for a listen first. Hi Jack thanks for the reply. which brand would you recommend for HFCs? Ignoring cost and also, would they make the car significantly quieter? thanks Quote Link to comment Share on other sites More sharing options...
Jack94 Posted October 23, 2019 Share Posted October 23, 2019 From personal experience I've only ever had Torqen HFCs which I rate really well because they were a perfect fit to my invidia system, seem really good quality, decent price and got me through an MOT no problem. There's loads of other reputable brands out there though such as ark, invidia, cobra, berk etc. 1 Quote Link to comment Share on other sites More sharing options...
Payco Posted October 23, 2019 Share Posted October 23, 2019 Just invest in an Ark Dual Grip and be Quote Link to comment Share on other sites More sharing options...
coldel Posted October 23, 2019 Share Posted October 23, 2019 @ILUVUNICORNS https://www.350z-uk.com/topic/124815-370z-standard-cats/ 1 Quote Link to comment Share on other sites More sharing options...
ILUVUNICORNS Posted October 23, 2019 Author Share Posted October 23, 2019 2 hours ago, coldel said: @ILUVUNICORNS https://www.350z-uk.com/topic/124815-370z-standard-cats/ Thanks dude. I’ve PM’ed him. PERFECT timing! Quote Link to comment Share on other sites More sharing options...
ILUVUNICORNS Posted November 16, 2019 Author Share Posted November 16, 2019 So today I had the Catalytic Converters put back on with the Cobra Cat-Back Exhaust. The car sounds so much better now without the Cobra Decats. The car still has the Stillen Gen 3 CAI, with the UpRev etc but the car sounds like I want it to, beefy but not too loud. Thank god! Decats are horrendous! Never again 3 Quote Link to comment Share on other sites More sharing options...
davey_83 Posted November 17, 2019 Share Posted November 17, 2019 Well done fella Quote Link to comment Share on other sites More sharing options...
coldel Posted November 18, 2019 Share Posted November 18, 2019 Forum Win - well done. Quote Link to comment Share on other sites More sharing options...
Payco Posted November 18, 2019 Share Posted November 18, 2019 I found taking the wife out the car reduces noise as well. Quote Link to comment Share on other sites More sharing options...
Ekona Posted November 18, 2019 Share Posted November 18, 2019 Why do you think I got divorced this year? No wife, quiet life. Quote Link to comment Share on other sites More sharing options...
coldel Posted November 18, 2019 Share Posted November 18, 2019 2 minutes ago, Ekona said: Why do you think I got divorced this year? No wife, quiet life. Says the chap who has just had a baby 2 Quote Link to comment Share on other sites More sharing options...
Ekona Posted November 19, 2019 Share Posted November 19, 2019 16 hours ago, coldel said: Says the chap who has just had a baby But you can lock a baby in the boot, or in a kitchen cupboard. Or so I heard, anyway. Ahem. Quote Link to comment Share on other sites More sharing options...
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