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I recently purchased the JBA headers with catless mids for my SPS. For those who have these installed, how loose do the bolts get? Do I need to buy stage 8 bolts for these?
Also will the car be fine after I install these with the catless mids with no tune for a couple of weeks until I get it tuned? I'm running with a muffler and reso delete as well.

Thanks guys.
 

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I did JAB shorties on my car, I used the 6.1 header bolts, they have heat activated thread locker. So far no problems
 
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