# RB20DET/Holset HY35 Questions!

**URL:** <https://forums.speedlife.net/t/rb20det-holset-hy35-questions/227156>\
**Category:** SON240sx Automotive\
**Created:** [November 12, 2012, 4:29pm UTC](https://forums.speedlife.net/t/rb20det-holset-hy35-questions/227156 "2012-11-12T16:29:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ecorrin](https://avatars.discourse-cdn.com/v4/letter/e/c37758/32.png) [@ecorrin](https://forums.speedlife.net/u/ecorrin)\
**Post date:** [November 12, 2012, 4:29pm UTC](https://forums.speedlife.net/t/rb20det-holset-hy35-questions/227156/1 "2012-11-12T16:29:34Z")

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Hey guys, just acquired a Holset HY35 for the also recently acquired RB20DET. I’d like to run a top mount set up but not sure of what manifold to use/size of the flange on the HY35. Obviously going to need a new exhaust side. Similar or the same as a T3/T4? Help please!!!

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**Author:** ![G-E](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/g-e/32/5546_2.png) [@G-E](https://forums.speedlife.net/u/G-E)\
**Post date:** [November 12, 2012, 5:26pm UTC](https://forums.speedlife.net/t/rb20det-holset-hy35-questions/227156/2 "2012-11-12T17:26:09Z")

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That’s going to be one laggy setup dude… but to answer your question they do have several turbine housings, best to search on a cummins/diesel forum for options, you might find a junkyard will yield the housing you want