xr6tee9 Member 82 Member For: 10y 10m 19d Gender: Male Location: adelaide Posted 30/01/14 11:39 AM Share Posted 30/01/14 11:39 AM gday all, just bought a bfII xr6t, has 4in stainless dump and high flo cat, it currently has the stock cat back system fitted but came with cat back xforce 2.5 in twin that the previous owner removed cause it was too loud.. pretty sure the car was tuned with the xforce exhaust..my question is.. will the stock cat back system effect the tunes performance?? Link to comment Share on other sites More sharing options...
freeze_dk I am dissatisfied with my current employment situation Donating Members 8,610 Member For: 18y 2m 20d Gender: Male Posted 30/01/14 01:59 PM Share Posted 30/01/14 01:59 PM If it was tuned with the exhaust on then yes. Link to comment Share on other sites More sharing options...
JVK Silver Donating Members 751 Member For: 19y Gender: Male Location: North West Hot Hell,VIC Posted 31/01/14 02:44 AM Share Posted 31/01/14 02:44 AM ^^^^^ Whs Link to comment Share on other sites More sharing options...
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