Kv! Donating Members 1,132 Member For: 14y 8m 29d Gender: Male Location: Eastern Suburbs, Melbourne Posted 13/06/10 06:21 AM Share Posted 13/06/10 06:21 AM Hey guys,Planning on getting one the xforce exhuasts through Rapid for my fg xr6t autoI dont want it to be too loud nor do I want the drone.I want the 4inch dump pipe to a hiflow cat.Would there be a difference between a 3.5inch vs the 4inch cat back performance wise?anyone have these on their fg? experiences?? videos?Cheers, Link to comment Share on other sites More sharing options...
Worm A much better forum Silver Donating Members 3,808 Member For: 16y 3m 22d Gender: Male Location: Victoria Posted 13/06/10 07:21 AM Share Posted 13/06/10 07:21 AM Only need 4 inch if you're going to upgrade turbo... Link to comment Share on other sites More sharing options...
bjc Donating Members 2,823 Member For: 21y 2m 10d Gender: Male Location: Townsville Posted 13/06/10 12:13 PM Share Posted 13/06/10 12:13 PM Dont bother with an exhaust at all if your not upgrading the turbo. Gains were minimal for the dollars Link to comment Share on other sites More sharing options...
RAP1D Member Donating Members 3,739 Member For: 18y 5m 25d Gender: Male Location: Sydney NSW Posted 14/06/10 07:19 AM Share Posted 14/06/10 07:19 AM If you sticking with the stock XR6/G6 turbo, the 4inch dump & cat will let you max out the stock turbo pretty easy as the rest of the factory system flows enough o support mid 300s.But if low-mid 300s arn't enough for you, and your thinking of upgrading the turbo ( F6 unit or rebuild ect ) the full 3.5inch system will be a good move as it will support over 400.The 3.5inch system sounds nice and is much quieter than the 4inch system, if your tossing up between them still. Link to comment Share on other sites More sharing options...
Johnny G Team Grandpa Qualified Donating Members 809 Member For: 19y 9m 1d Gender: Male Location: Brisbane North. Posted 14/06/10 12:57 PM Share Posted 14/06/10 12:57 PM Have the X Force mild steel 3.5" system with 4inch dump and metal cat on mine - sound / noise level is fine after the first couple of weeks and it coats up.... a little noisy initially. Beautiful burble on overrun. Check out photo's in my garage. Link to comment Share on other sites More sharing options...
Kv! Donating Members 1,132 Member For: 14y 8m 29d Gender: Male Location: Eastern Suburbs, Melbourne Posted 16/06/10 03:59 AM Author Share Posted 16/06/10 03:59 AM Are their any hiflow cats that bolton to the standard system ? Link to comment Share on other sites More sharing options...
RAP1D Member Donating Members 3,739 Member For: 18y 5m 25d Gender: Male Location: Sydney NSW Posted 16/06/10 04:13 AM Share Posted 16/06/10 04:13 AM I have direct bolt in race cats for FG on their way, around 6 weeks away though. Link to comment Share on other sites More sharing options...
riki83 Silver Donating Members 384 Member For: 14y 8m 27d Gender: Male Location: Kellyville, Sydney Posted 25/06/10 07:06 AM Share Posted 25/06/10 07:06 AM I have modded my fg xr6 turbo and I have a 4"dump, 3.5" cat and exhaust. its supported me to 426 rwkw so far but I need to go bigger to support me over 450+.I will be upgrading to a 4"dump, 5"cat and 4" system which will be plenty as my exhaust was holding me back from extracting everything this car has. The next step will be a bigger turbo but that's not going to happen. This ute is crazy to drive and the exhaust does sound pretty good. Most people think there is a screamer pipe on it!! Link to comment Share on other sites More sharing options...
FGXR6T-UTE Member 25 Member For: 14y 6m 3d Gender: Male Location: Campbelltown, NSW. Posted 22/07/10 07:36 AM Share Posted 22/07/10 07:36 AM I just emailed rapid yesterday about the xforce 4" system, is the 4" system overly loud or just louder than the 3.5" system cause I dont mind it loud personaly but dont want to get pulled over and done by the cops. Link to comment Share on other sites More sharing options...
RAP1D Member Donating Members 3,739 Member For: 18y 5m 25d Gender: Male Location: Sydney NSW Posted 22/07/10 10:58 AM Share Posted 22/07/10 10:58 AM If your concerned about noise mate, go for the 3.5inch system... the 4inch is louder. Link to comment Share on other sites More sharing options...
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