jamie1234 Posted March 27, 2016 Share Posted March 27, 2016 Hi all I'm aware this topic has probably been talked to death about... Currently running Crawford racing sports cats however, i think one of them is on its way out so going to need to change.. I would like to reduce the noise slightly, as it gets very droney as a daily.... Also running 5zigen proracer with envy Y-pipe. But do i go decat or HFC? I know power differences would be little to nothing but in terms of sound..? If i go HFC do i replace with crawford (they have lasted nearly 8 years) or have people had better experience with other HFCs? Also something that marries up with the rest of the system is important.. Money is a factor however i don't want to skimp out on quality And i'm aware of the legality of decats... Thanks is advance! Quote Link to comment Share on other sites More sharing options...
ZeppoJeff Posted March 27, 2016 Share Posted March 27, 2016 Personally I'd say HFC unless you are planning on supercharging. Quote Link to comment Share on other sites More sharing options...
jamie1234 Posted March 27, 2016 Author Share Posted March 27, 2016 Personally I'd say HFC unless you are planning on supercharging. I'd like to plan for FI down the line... whether it happens or not, well... Not really very knowledgeable in this area... are Decats essential for superchargers? is it the same for turbos? Quote Link to comment Share on other sites More sharing options...
ZeppoJeff Posted March 27, 2016 Share Posted March 27, 2016 Personally I'd say HFC unless you are planning on supercharging. I'd like to plan for FI down the line... whether it happens or not, well... Not really very knowledgeable in this area... are Decats essential for superchargers? is it the same for turbos? If you've got HFCs instead of decats on a supercharger build then you will just burnt them out and they will come decats anyways. So no real point spending the extra cash if you get me. 1 Quote Link to comment Share on other sites More sharing options...
Adrian@TORQEN Posted March 27, 2016 Share Posted March 27, 2016 What Jeff said above, if you're planning going FI soon, don't waste money on HFC, they will be burnt very quickly. In terms of HFC, Berks are very popular around here. Another factor to consider, test pipes will create a bit of raspiness, unless you go for more expensive ones like the MOtordyne ART. You can have a look here to see what else is available: http://www.torqen.uk/88-test-pipes http://www.torqen.uk/86-high-flow-cats Quote Link to comment Share on other sites More sharing options...
jamie1234 Posted March 27, 2016 Author Share Posted March 27, 2016 If you've got HFCs instead of decats on a supercharger build then you will just burnt them out and they will come decats anyways. So no real point spending the extra cash if you get me. I'm with you! is this the same for turbos also? recommend any particular HFCs? Off topic.... how do sc owners stay "street legal" without cats? Quote Link to comment Share on other sites More sharing options...
Adrian@TORQEN Posted March 27, 2016 Share Posted March 27, 2016 Turbo come with their own downpipes so no need for HFC/test pipes, but you can have HFC on some of the kits, like the AAM ones on 370z. 1 Quote Link to comment Share on other sites More sharing options...
ZeppoJeff Posted March 27, 2016 Share Posted March 27, 2016 If you've got HFCs instead of decats on a supercharger build then you will just burnt them out and they will come decats anyways. So no real point spending the extra cash if you get me. I'm with you! is this the same for turbos also? recommend any particular HFCs? Off topic.... how do sc owners stay "street legal" without cats? I'm not supercharged yet but as far as I'm aware it friendly MOT testers or the pain or swapping them over for tests. Don't take my word for it though 1 Quote Link to comment Share on other sites More sharing options...
jamie1234 Posted March 27, 2016 Author Share Posted March 27, 2016 What Jeff said above, if you're planning going FI soon, don't waste money on HFC, they will be burnt very quickly. In terms of HFC, Berks are very popular around here. Another factor to consider, test pipes will create a bit of raspiness, unless you go for more expensive ones like the MOtordyne ART. You can have a look here to see what else is available: http://www.torqen.uk/88-test-pipes http://www.torqen.uk/86-high-flow-cats I am by no means planning for FI any time soon, but i'd like to keep my options open incase I fall into a pot of gold :lol: as for the sound would test pipes be louder than HFCs for normal 60-80mph driving? Quote Link to comment Share on other sites More sharing options...
jamie1234 Posted March 27, 2016 Author Share Posted March 27, 2016 Turbo come with their own downpipes so no need for HFC/test pipes, but you can have HFC on some of the kits, like the AAM ones on 370z. Ahhh think i need to do some research into this.... If you've got HFCs instead of decats on a supercharger build then you will just burnt them out and they will come decats anyways. So no real point spending the extra cash if you get me. I'm with you! is this the same for turbos also? recommend any particular HFCs? Off topic.... how do sc owners stay "street legal" without cats? I'm not supercharged yet but as far as I'm aware it friendly MOT testers or the pain or swapping them over for tests. Don't take my word for it though Thought as much are you planning on SC?? Quote Link to comment Share on other sites More sharing options...
Adrian@TORQEN Posted March 28, 2016 Share Posted March 28, 2016 as for the sound would test pipes be louder than HFCs for normal 60-80mph driving? Yes, a bit louder You might also get some droning with the simple test pipes, not with Motordyne ART or ARK R Spec test pipes. Quote Link to comment Share on other sites More sharing options...
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