rbjet Skid Machine Donating Members 1,640 Member For: 13y 8m 9d Gender: Male Posted 25/03/12 11:43 PM Share Posted 25/03/12 11:43 PM Well that explains it then. Still good power with that exhaust though. Link to comment Share on other sites More sharing options...
BRK Member 361 Member For: 13y 1m 20d Gender: Male Location: Perth Posted 26/03/12 12:09 AM Share Posted 26/03/12 12:09 AM Its not only the pipe diameter, its the design quality and flow rate of the mufflers. Have a look at the system underneath a 6.3 litre AMG Merc. The better versions are rated at 380KW at the engine. The mufflers are huge and yet the cars are Euro 4 noise compliant. (And that is pretty quiet)A single 90MM exhaust will support 530HP at the wheels - ( Hi Mount and external gate setup) and that was witnessed. It was pretty noisy, but that is how the owner wanted it. So, 400RWKW on twin 63 pipes with the 100 dump and a good cat seems about right to me.No knowledge on the Xforce quad system. Never seen one on the dyno. Link to comment Share on other sites More sharing options...
Jesse Williams_49219 Member 26 Member For: 12y 9m 22d Posted 28/06/13 02:40 AM Share Posted 28/06/13 02:40 AM I have a complete xforce system. 3 1/2" dump with separate 1/2" wastegate pipe, 3 1/2" cat and twin 2 1/2 cat back making 411rwkw on e85. Sounds amazing and goes hard, but I'm looking to upgrade to a single 3 1/2 cat back. Link to comment Share on other sites More sharing options...
rednose RNS10S Donating Members 2,229 Member For: 18y 5m 17d Gender: Male Posted 28/06/13 03:35 AM Share Posted 28/06/13 03:35 AM I'm at 422 on e85 with a twin 2.5 x-force. Link to comment Share on other sites More sharing options...
El Andrew Gold Donating Members 2,036 Member For: 9y 9m 11d Gender: Male Location: Canberra ACT Posted 11/05/17 10:24 AM Share Posted 11/05/17 10:24 AM Got a muffler on the blink and given both are original are therefore 17 years old, I'm thinking a new cat back system will be most cost-effective. Anyone had any experience with the Xforce S-series 2.5" system (dual pipe running side by side to twin tip, not the quad system)? For a bolt in factory replacement and for about $500 it is looking good to me. Keen for a slightly meatier sound than stock without getting drony or scaring the neighbours' kids. Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 2m 9d Gender: Male Location: Probably above atmospheric pressure Posted 11/05/17 11:15 AM Share Posted 11/05/17 11:15 AM 51 minutes ago, El Andrew said: Keen for scaring the neighbours' kids. fixed 2 Link to comment Share on other sites More sharing options...
camo86T Silver Donating Members 1,810 Member For: 10y 11m 21d Gender: Male Location: SW Sydney Posted 11/05/17 11:40 PM Share Posted 11/05/17 11:40 PM @El AndrewI've got the twin 2.5" after 4" dump and cat Made power as per my sig 380rwkw on 98 and 438rwkw on e85 if you can't see it Yeh ok, insert fartingthruastraw.jpeg but it's pretty quiet on idle, no droning whatsoever and wasn't the restriction for more power anyway, that was the fuel system Their dump pipes are sh*t quality IMO, but for catback can't go wrong with your application Link to comment Share on other sites More sharing options...
El Andrew Gold Donating Members 2,036 Member For: 9y 9m 11d Gender: Male Location: Canberra ACT Posted 12/05/17 02:17 AM Share Posted 12/05/17 02:17 AM Thanks for that! Sounds perfect for what I want. I had the EL pretty loud which was fun for a few weeks but just got annoying after that. Kept setting off car alarms at my work, and the wife kept getting "heaps sick miss" comments from her students at school. I've done the cat already so exhaust should be sorted then to cover me now, plus any future plans. Link to comment Share on other sites More sharing options...
El Andrew Gold Donating Members 2,036 Member For: 9y 9m 11d Gender: Male Location: Canberra ACT Posted 20/05/17 01:06 AM Share Posted 20/05/17 01:06 AM Well hello there. Ended up $399 delivered to my door in less than 48 hours. Will now be 48 weeks until I find the time to fit it. 2 Link to comment Share on other sites More sharing options...
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