Mk4Gaz Posted July 15, 2013 Share Posted July 15, 2013 Hi guys, in planning my bpu upgrades, I've been thinking about getting a free flowing exhaust. I had a look at the one fitted to my car today, and it looks like it may already be non standard (judging by pics I've seen), but I can't find any markings on it to suggest what it might be. I've taken a couple of shots as best as I can, and wondered if anyone could shed any light on it? Also, it appears that I already have a second decat, but is it essential that I also fit a first decat pipe for bpu? Quote Link to comment Share on other sites More sharing options...
supra_ufo Posted July 15, 2013 Share Posted July 15, 2013 yes you need a 1st decat pipe and a restrictor ring read the following http://www.mkivsupra.net/vbb/showthread.php?94705-BPU-(Basic-Performance-Upgrade) Quote Link to comment Share on other sites More sharing options...
Guest Benny9 Posted July 15, 2013 Share Posted July 15, 2013 Hi Gaz Looks like a custom jobby but I may be wrong. Re bpu, yes you would need to get both de-cats with a restrictor ring. Check these links out, they really helped me get a better understanding of whats going on: http://www.mkivsupra.net/vbb/showthread.php?94705-BPU-(Basic-Performance-Upgrade) http://mkivsupra.net/vbb/showthread.php?35926-The-sequential-system Good luck mate. Quote Link to comment Share on other sites More sharing options...
Littler Posted July 15, 2013 Share Posted July 15, 2013 (edited) Are you sure it has a 2nd decat as the pic is only of the catback? Better to be sure and maybe post a pic of that? Edited July 15, 2013 by Littler (see edit history) Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted July 15, 2013 Author Share Posted July 15, 2013 Thanks very much guys, any help appreciated as always I had seen a link about bpu bits, but to be honest, I'm still getting my head around these cars - so there will probably be more questions yet! Littler - there's definitely a decat pipe in place of the second cat, it's just a 'z' shaped pipe from the 1st cat to the back box pipework. The current exhaust sounds really nice, it's virtually silent. What I didn't want to do, is gonout and buy something different if I don't need it - I like the look of the 4" outward rolled tip Quote Link to comment Share on other sites More sharing options...
Nic Posted July 15, 2013 Share Posted July 15, 2013 It is definitely not a stock exhaust. It will sound a fair bit louder once the 1st cat is removed Quote Link to comment Share on other sites More sharing options...
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