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I know this has been covered before but i searched and searched but couldnt find the info i needed.

Basically my question is this...

What is needed to bolt the rb25 turbo onto the rb20det? Does anything need to be changed or is it simply a bolt off - bolt on...what about gaskets? is it fine to use the old ones? oil lines? water lines? Anything that anyone can think of that needs to be changed please state what it is...

also i have an rb20det in my s13...will it still all line up (dump pipe etc...)?

Any answers appreciated except "Do a search".

Thanks in advance,

Joh

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https://www.sau.com.au/forums/topic/64209-rb25-turbo-onto-rb20det/
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If it is a R32(silver top) Rb20det then it will bolt straight up like a Rb20det turbo.It's best to get the RB25 elbow(intercooler bend)that comes off the comp housing as it's got a bigger internal hole.Also put the Rb20det acuator on the RB25 turbs for more boost.RB20/25 dumps are the same.

You can still use the RB20det elbow on the RB25 turbo but you need to drill out the 3 blot holes.Also you can use the RB25 acuator but it holds lower boost,like 7psi or something.

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