Credit: Gerald Johnson
Order Link: https://www.jeminiperformance.com/product-page/headers-nissan-maxima-2009-2024
Price: $599.00
I recently installed Jemini Power Performance headers and a Y-pipe on my 2014 Nissan Maxima engine swap. As Adam mentioned in an earlier post, when it comes to the O2 sensors, here’s what you’ll need:
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Two 90° O2 spacers for the downstream sensors
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Harness extenders for the upper two sensors (see photos)
For the rear downstream sensor, you’ll need to remove the 90-degree fitting and use only the extension portion—otherwise, the passenger-side CV axle will be in the way.
If you decide to tune your Maxima (which I’ll be doing soon), you’ll probably need harness extenders for the downstream sensors too, once you remove the spacers for the tune.
You can order the o2 extensions via Nisformance here. You need to look at your plug and then check against the type to ensure you get the correct one.
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