xr6tForMe Donating Members 272 Member For: 11y 7m 27d Gender: Male Posted 29/09/15 04:13 AM Share Posted 29/09/15 04:13 AM It looks like the Euro 4 cat may have a larger cross sectional area, so it may flow better than the previous one.It could also be more restrictive, due to other internal differences.Has anyone tested flow of the Euro 4 cat vs the previous FG turbo cat? Link to comment Share on other sites More sharing options...
Lennox Member 2,586 Member For: 11y 11m 30d Gender: Male Location: Perth Posted 29/09/15 04:19 AM Share Posted 29/09/15 04:19 AM Has a restrictor ring in it to bottleneck the flow but you can cut it outSome tuners say you can make like 330rwkw with the restrictor ring outMine did not agree. So unsure as to who is correct. 1 Link to comment Share on other sites More sharing options...
xr6tForMe Donating Members 272 Member For: 11y 7m 27d Gender: Male Posted 29/09/15 09:49 AM Author Share Posted 29/09/15 09:49 AM Good point Lennox. I had thought that the restrictor ring was in the start of the next section of exhaust, but I think you are right and it is in the end of the cat section. Obviously I would be interested in flow comparison with the restrictor ring removed. My thoughts are that this may be similar to the F6 injectors and intercoolers - not a huge upgrade, but likely to be available pretty cheap (eg someone doing an upgrade gives the unwanted stock parts to a mate), so could be worth swapping. Link to comment Share on other sites More sharing options...
Lennox Member 2,586 Member For: 11y 11m 30d Gender: Male Location: Perth Posted 29/09/15 08:34 PM Share Posted 29/09/15 08:34 PM It is definitely in the cat cos I have cut one out myself 1 Link to comment Share on other sites More sharing options...
Bizkets is Drunk? Too heavy needs boost Member 5,929 Member For: 11y 6m 19d Gender: Male Location: Adelaide Posted 29/09/15 09:24 PM Share Posted 29/09/15 09:24 PM Get rid of the ring and gut the cat. that's what I got done to my stock exhaust. Link to comment Share on other sites More sharing options...
julesk_1972 Member 267 Member For: 12y 7m Gender: Male Location: Perth Posted 30/09/15 03:41 AM Share Posted 30/09/15 03:41 AM Venom cat, tried - tested - proven.Sent from my HTC One_M8 using Tapatalk Link to comment Share on other sites More sharing options...
xr6tForMe Donating Members 272 Member For: 11y 7m 27d Gender: Male Posted 30/09/15 01:47 PM Author Share Posted 30/09/15 01:47 PM (edited) Biz,That is a great answer for outright power on a budget, but not so great for emissions/legality Jules, Again a good answer - venom is known to make good products- butA. is going to costB. it is going to look non standard (which may lead to being tested)C. Which of the products 4", 4.5", 5" and which cell per square inch configuration 100, 200 or 400D. Assuming the biggest/best flowing (5" 100 cell), will it still pass emission testing?Even with the restrictor ring removed, I would guess that the euro 4 cat would be at least as clean as the previous cat which had no restrictor ring.Flow information would give a definite answer about one being less restrictive than the other. Edited 30/09/15 01:51 PM by xr6tForMe Link to comment Share on other sites More sharing options...
camo86T Silver Donating Members 1,810 Member For: 11y 13d Gender: Male Location: SW Sydney Posted 01/10/15 04:08 AM Share Posted 01/10/15 04:08 AM If you're worried about cost, emissions, legality and looking standard then maybe modifying cars isn't really your thing 3 Link to comment Share on other sites More sharing options...
xr6tForMe Donating Members 272 Member For: 11y 7m 27d Gender: Male Posted 01/10/15 11:47 AM Author Share Posted 01/10/15 11:47 AM If you're worried about cost, emissions, legality and looking standard then maybe modifying cars isn't really your thingI can see where you are coming from, but different people have different priorities. Some like "bling" some like "sleeper", some like "big budget" some like "bang for buck"Each to their own. Link to comment Share on other sites More sharing options...
Skids4kids in the mid....not the bum like some Member 609 Member For: 11y 10m 2d Gender: Male Posted 01/10/15 11:03 PM Share Posted 01/10/15 11:03 PM Too many on here also seem to live in a perfect world..... Link to comment Share on other sites More sharing options...
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