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The extra holes in the stock manifold?

carguyinok
in Exhaust

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So I had a few of the guys looking over parts of the 240 tonight. One of them asked about the allen bolts that are in the stock exhaust manifold. One hole with a plug in each port.

Whats the deal with them? The only thing we could think is they are ports for a temp unit used at the factory for tuning.

Just one of those things that I would like too answer for them. :stupid:

Nope, air injection. Smog gear that's been removed.

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