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Discussion Starter · #1 ·
I’ve recently learned that the precats on the Spec V’s can start failing and hurt the engine, so I want to get headers for my ‘06. But doing research I’m a little confused. I’m new to cars in general, so apologies if this is a total newb question.
Where does the spacer go? Some of pictures show it just sitting in the pipe. Do I have to drill a hole? Do I have to get a vehicle specific spacer? Will it still pass emissions? Is it even worth getting “performance” headers or should I just replace the precat?
 

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Pretty much all spacers are universal. The midpipe/downpipe/secondary pipe, or whatever you wanna call it, has a bung for your stock o2 sensor. Basically you get a spacer and mount that in the pipe first, then put the stock sensor back in.

There's a ton of types of spacers, nowadays. Angled, curved, etc. I used the Help! brand that you can find at autozone/advanced/oreillys, etc.

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