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By Batbaruman · Posted
went to couple places, can't get WOF. d'oh. really annoying timing but not end of the world. looks like back to taking bus to work for a little while. tints. annoying but easy will find out how and rip it off, will have to source whatever is the currently legal darkest one. im not fussed to argue this and the rear windshield is too dark IMO probably lucky to pass on it previously exhaust "EXC Exhaust Catalytic Converter To Comply Check Manufacturers Spec.". Has catless downpipe going to hks catback system, so i gotta get a cat to remediate. if was registered on or before 1st May 2010 then wouldn't need a cat, but this car landed Nov 2011 i'll need one to be legal https://www.lvvta.org.nz/documents/infosheets/LVVTA_Info_10-2011_Exhaust_Gas_Emission_Standard_Revision.pdf if i wanna be extra thrifty, i can just order a high flow cat and have it welded on i guess? but seems the other option is those things like invidia hifhflow cat/downpipe which would be bolt on solution. will try reach out to places and see what they can price up. hoping i don't next get hit with a 'oh that exhaust needs an LVV now" . tune wise in theory if i stick to nice high flow cat i really shouldn't need retune ? if im certing/retune i'll rather go all out and change a few other things .. temptation is coming on 😆 -
Could getting around this be get the WRX Hoses and a Bottle? -
ok sweet, I found the original O2 sensor wire extension under my seat so its all good to go. The exhaust is pretty straight and 3 inch all the way to about an inch before the genome muffler so it cuts out the bends and flanges so airflow should be okay even if it does have the restriction. -
Not sure really. I went to an obnoxiously loud 3" (not a straight pipe mind you, it has a muffler and resonator) and it made more power again, but we changed a couple of other things. Would it have made >230kw with the old exhaust and those things changed? Not sure. What I'm getting at is that a smaller (or at least, constricted design) exhaust is definitely a significant restriction at those power levels, whereas a freeflowing 3" didn't seem to be. Nope, no difference. Make sure the loom is long enough. On a V7 the O2 sensor should be at the bottom, if it's at the top you probably have a GC/GF downpipe shoehorned in.
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Another question, The exhaust from the donor car has the o2 sensor in the 'post cat' area of the downpipe (if there was a cat) but on my car the o2 sensor is at the very top of the downpipe. Will it matter if I move the o2 sensor from top of downpipe to underneath the car without screwing with the tune? I doubt it matters but wanna be sure. Neither exhaust has a cat.
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