ShanSal Member 24 Member For: 15y 8d Gender: Male Location: Canberra Posted 25/06/10 04:10 AM Share Posted 25/06/10 04:10 AM Just wondering if anyone here has been pulled up for having their xforce system (mines a 3.5 inch dump and cat into 2.5 duals) to loud.Im changing my rego over at the moment into ACT, and it hasnt passed inspection because it went 96db.a bit hard to quieten down the system with the 2.5inch duals.So yeah just wondering how loud everyone else's system is that is similar? Link to comment Share on other sites More sharing options...
berzerker Donating Members 767 Member For: 17y 1d Gender: Male Location: Brisbane Posted 25/06/10 04:18 AM Share Posted 25/06/10 04:18 AM Really? Ive got the same system and wish it was quite a bit louder! Link to comment Share on other sites More sharing options...
Daniel Member 299 Member For: 21y 5m 16d Gender: Male Posted 25/06/10 05:03 AM Share Posted 25/06/10 05:03 AM Does it have the smaller (louder) mufflers or the larger (quieter) mufflers?There is 2 muffler styles and then you have a choice or mild or stainless steel...I have to say I have (and still have) issues with mine being noisy inside the car, but its not too bad outside unless its off cold start or very hot from an extensive drive.I use the 4" dump however; which may attribute to my inside noise concerns. Link to comment Share on other sites More sharing options...
gregor Member 459 Member For: 16y 4m 1d Posted 25/06/10 06:26 AM Share Posted 25/06/10 06:26 AM There's lots of stuff you can do. Stuffing steel wool up there is one option that's been popular. Alternatively use some thin metal sheets inserted between the flanges with a strainer style design to restrict flow and get noise reduction. Obviously you dont want to boot it around if your doing that, just pass and remove them. Or change your rear muffler to something more restrictive/stock. Link to comment Share on other sites More sharing options...
ShanSal Member 24 Member For: 15y 8d Gender: Male Location: Canberra Posted 27/06/10 03:20 AM Author Share Posted 27/06/10 03:20 AM Does it have the smaller (louder) mufflers or the larger (quieter) mufflers?There is 2 muffler styles and then you have a choice or mild or stainless steel...I have to say I have (and still have) issues with mine being noisy inside the car, but its not too bad outside unless its off cold start or very hot from an extensive drive.I use the 4" dump however; which may attribute to my inside noise concerns.I must have the Louder system.Love the sound it makes wish I didnt have to quieten it.. Link to comment Share on other sites More sharing options...
Daniel Member 299 Member For: 21y 5m 16d Gender: Male Posted 27/06/10 04:07 AM Share Posted 27/06/10 04:07 AM The right way to quieten it down would be to change those mufflers then.It'd be a shame if you wanna keep it sounding like that though, as its not a free swap lol.I'd have a chat to your local exhaust shop, preferably a custom place, not doing so much of the "off the shelf" systems. Link to comment Share on other sites More sharing options...
sexual harrassment panda I see a red door and I want to paint it black Donating Members 5,919 Member For: 15y 1m 27d Gender: Male Location: Far north queensland Posted 27/06/10 06:46 AM Share Posted 27/06/10 06:46 AM find someone with the quiet x-force twins in your region, pay for the exhaust swap and reswap to be done and give them a carton Link to comment Share on other sites More sharing options...
ShanSal Member 24 Member For: 15y 8d Gender: Male Location: Canberra Posted 28/06/10 01:46 PM Author Share Posted 28/06/10 01:46 PM So Yeah... Got my road worthy certificate today.Went to the local Exhaust Centre, the guys there took out the Gasket at the join, before the rear muffler and placed a custom plate that had 3 smaller holes per pipe, thus restricting flow and noise to 93db. UNFORTUNATLY still wasnt good enough for the guys doing the certificate(AGGRAVATING), so a quick trip to Bunnings. A pack of steel wool,A broom stick, to push it in to the end of the rear mufflerA role of wire, to make a hook to fish it out straight awayand I returned with a db reading of right on 90...Thanks everyone for you suggestions, in particular GREGOR for mentioning steel wool.Now I can go back to my Glorious sounding exhaust system, which I found out was actually 98db. Link to comment Share on other sites More sharing options...
gregor Member 459 Member For: 16y 4m 1d Posted 29/06/10 10:09 PM Share Posted 29/06/10 10:09 PM no worries, glad to be able to help. I know far too much about noise and emissions tests at the moment :( Link to comment Share on other sites More sharing options...
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