# questions regarding RB25det in 93 240sx

**URL:** <https://forums.speedlife.net/t/questions-regarding-rb25det-in-93-240sx/124743>\
**Category:** SON240sx Automotive\
**Created:** [May 24, 2009, 4:26pm UTC](https://forums.speedlife.net/t/questions-regarding-rb25det-in-93-240sx/124743 "2009-05-24T16:26:29Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\
**Post date:** [May 24, 2009, 4:26pm UTC](https://forums.speedlife.net/t/questions-regarding-rb25det-in-93-240sx/124743/1 "2009-05-24T16:26:29Z")

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Before I start, I will have you know I have searched and have not found the answer to what I am looking for.

I am picking up a 1993 Nissan 240SX SE fastback that currently has a KA24DE in it. I am not doing a Swap soon (as the engine runs mint and only has 147,000 on it!) but I will be gathering parts here and there to make it easier on my pockets. But I need answers first, in which to direct me in the right route, and gather the right parts…

In Order to but a Rb20 in a 240 a new driveshaft is NOT required. The KA will fit perfect.  
However putting a Rb25 in a 240 DOES require a new driveshaft.

here’s the situtation,

If I were to buy a RB25det MOTOR only and put on my RB20 transmission, will the stock KA driveshaft still be usable? Has anyone done this before? I figure with the Rb25det motor, Rb20 tranny and KA driveshaft, im good to rolll??

Thanks  
Kyle

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**Author:** ![PureEuroM3](https://avatars.discourse-cdn.com/v4/letter/p/3bc359/32.png) [@PureEuroM3](https://forums.speedlife.net/u/PureEuroM3)\
**Post date:** [May 24, 2009, 5:02pm UTC](https://forums.speedlife.net/t/questions-regarding-rb25det-in-93-240sx/124743/2 "2009-05-24T17:02:28Z")

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Bring it to M.S.S.C(Mean Street Speed and Customs) Fitzy! They can help you with everything lol.

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**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\
**Post date:** [May 24, 2009, 5:31pm UTC](https://forums.speedlife.net/t/questions-regarding-rb25det-in-93-240sx/124743/3 "2009-05-24T17:31:56Z")

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dont remind me…

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**Author:** ![simplemind7](https://avatars.discourse-cdn.com/v4/letter/s/0ea827/32.png) [@simplemind7](https://forums.speedlife.net/u/simplemind7)\
**Post date:** [May 24, 2009, 10:08pm UTC](https://forums.speedlife.net/t/questions-regarding-rb25det-in-93-240sx/124743/4 "2009-05-24T22:08:16Z")

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Yeah, with a 20 tranny you can use a KA drive shaft, my old car was like that.

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**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\
**Post date:** [May 25, 2009, 6:21am UTC](https://forums.speedlife.net/t/questions-regarding-rb25det-in-93-240sx/124743/5 "2009-05-25T06:21:32Z")

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Thank you sir.