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What do these items do?!

345 Views 5 Replies 3 Participants Last post by  puntogtkid
What is the function of these two items as they both have vaccum lines to them?? just curious? will they need to be blanked to obtain higher boost or anything like that?
both items are located by the drivers side bulkhead, one is that canister like valve the other is a black box located just below the canister. both items illustrated in pictures. thanks!

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Looks like ones for aftermarket gauge and the other is for the stock boost gauge i think?
yeh i think the top one is a sender unit for a gauge and the bottom one is the stock boost gauge unit
so in a nutshell, the blackbox is factory, canister is after market?
i know sorry :( will have a proper picture tommorow, had crap camera on me :(
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