judiciousjoe Posted July 23, 2017 Share Posted July 23, 2017 (edited) Hi everyone, My Nismo cat back gave up on me recently and sounded very sorry for itself so I needed a new system. After a lot of looking around I opted for the Tomei titanium single exit. The craftsmanship is pornography and it weighs a feather. However, my god is it LOUD! I bought the full system including the y-pipe seeing as mine was broken. Is there any way I could quieten it down a bit? I currently have DC headers/manifolds, Berk de cat pipes and the y-pipe back Expreme Ti system, the car is also HKS supercharged. It is not a pleasant drive on the motorway, it drones to the state where you need to pop pills for a headache. If there is no possible solution then I was thinking of buying the true dual HKS cat back (and selling the Tomei on to someone who has OEM/sports cats and standard manifolds for less volume). Any help would be much appreciated. Cheers Joe Edited July 23, 2017 by judiciousjoe Quote Link to comment Share on other sites More sharing options...
Kev Posted July 23, 2017 Share Posted July 23, 2017 (edited) Think I was just looking at your nismo exhaust on eBay. Adding cats should help quiten it down a bit. Edited July 23, 2017 by Kev Quote Link to comment Share on other sites More sharing options...
judiciousjoe Posted July 23, 2017 Author Share Posted July 23, 2017 14 minutes ago, Kev said: Think I was just looking at your nismo exhaust on eBay. Adding cats should help quiten it down a bit. Indeed, I wanted someone to fix her up and enjoy the Nismo again as I don't have the money to pay in labour. I have eaten through two sets of HFC's, the supercharger tore them to shreds. Quote Link to comment Share on other sites More sharing options...
Kev Posted July 23, 2017 Share Posted July 23, 2017 Can't seen how you can quiten it down with that set up. I can imagine it sounds epic if a bit much. No doubt someone will take a punt on your nismo. I've always wanted one myself. Quote Link to comment Share on other sites More sharing options...
Ian Posted July 23, 2017 Share Posted July 23, 2017 (edited) i made the same mistake! I had the ti decats also though. Ive put OEM cats back in now and while it is quieter it's still ridiculously loud Edited July 23, 2017 by Ian Quote Link to comment Share on other sites More sharing options...
ZeppoJeff Posted July 23, 2017 Share Posted July 23, 2017 I'll swap you my invidia true dual and 60mm invidia test pipes Quote Link to comment Share on other sites More sharing options...
Sargara Posted July 23, 2017 Share Posted July 23, 2017 I don't think any aftermarket exhaust is going to really help you with that setup you are running. The only reason the Nismo was quieter I imagine is because it retains a lot of the OEM'ness with its large backbox. Quote Link to comment Share on other sites More sharing options...
Kev Posted July 23, 2017 Share Posted July 23, 2017 Tarmac has a Fujitsubo which is said to be very similar to the nismo. I was interested before I had to buy banana arms. Quote Link to comment Share on other sites More sharing options...
StevoD Posted July 23, 2017 Share Posted July 23, 2017 Your basically running a straight pipe, what was you expecting 1 Quote Link to comment Share on other sites More sharing options...
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