18" Rear Flat Four Pin O2 Extension - 2004-06 Pontiac GTO

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This flat 4 pin O2 extensions will extend your GTO's rear O2 wiring harnass by 18 inches.  Price is for one O2 extension. When ordering more than one, change quantity to two. Most header installs on a 2005-2006 GTO will only require one of these, though two makes it easier. The 2004 GTO normally does not require rear O2 extensions for a header install; the factory wiring is long enough already.

If buying for a header install, please confirm the manufacturer does not already include all needed O2 extensions before purchasing these. Any returns will be issued as store credit mius shipping.

Will fit rear O2's sensors only.


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