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totq said:It is very easy, disconnect wire connection then use a spanner to unscrew the old one out of the exhaust pipe.
Drive the front end onto car ramps. Should be on passenger side on engine pipes.
Reversal for installing new one.
Recommendation - buy a genuine one about $190.
Jon Z said:Thats a bit rich holden wanted $90 each for my VS SII but i managed to grab 2 NTK ones from Repco for $65 each. Also a mate of mine bought genuine from holden for his VR and pretty sure he didnt pay more than $100.