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I got a Gt3076r for my RB25DET. Does anyone know if there is a built in oil feed restrictor or if you need to do that separately. I can't seem to get a straight answer. 

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Thanks just wanted to make sure so I dont mess something up.

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Too easy mate, this is from Garret's website - https://www.garrettmotion.com/racing-and-performance/choosing-a-turbocharger/turbo-system-optimization/

Oil Supply & Drainage

BALL BEARING TURBO

An oil restrictor is recommended for optimal performance with ball bearing turbochargers. Oil pressure of 40 – 45 psi at maximum engine speed is recommended to prevent damage to the turbocharger’s internals. In order to achieve this pressure, a restrictor with a 0.040” orifice will normally suffice, but you should always verify the oil pressure entering the turbo after the restrictor in ensuring that the components are functioning properly. Recommended oil feed is -3AN or -4AN line or hose/tubing with a similar ID. As always, use an oil filter that meets or exceeds the OEM specifications.

Edited by Murray_Calavera

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I heard somewhere that some of them came with oil restrictors built in. Is that just straight up wrong?

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I'm hesitant to say 'it's wrong' as I don't really like absolutes... 

However, I don't see how they could incorporate an oil restrictor as there are different sized restrictors for different applications. 

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