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So I'm currently at work and not near my truck but I wanted to grab some stainless hardware for the kooks y-pipe . Last time I was under my truck the stuff from kooks is all rusted and wouldn't budge. I'm looking to replace it with stainless can anyone give me the sizes ? Thanks!
 

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07 TrailblazerSS AWD
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Damn I just installed Kooks headers/y/catback last night.....Pretty sure 10mm.. I will be under it again in the morning to re-tighten everything - will take some measurements for you.
 
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