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data-content-selector="#post-5969464">azuelke said:</a>
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I would start with intake, header, and exhaust.
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Intake and exhaust are pretty well covered for this platform (not much money to be made there). The only currently produced header is the obx and we all know it's crap. If someone (cpe, corksport, cr3, etc) would produce a decent 4-2-1 header like the awr or Mazdaspeed and sold it for around 300-400, on an ongoing basis, they would get every NA protege sale ever lol.<br />
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<blockquote data-attributes="member: 12013" data-quote="Boston5761" data-source="post: 5969473"
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data-content-selector="#post-5969473">Boston5761 said:</a>
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TB spacer that has some decent r&d behind it
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There are a couple companies that make TB and IM thermal spacers. I have the set from outlaw engineering.</div>