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Discussion Starter #1
Hi

I'm new to the subie family and I am in love with my forester! However instead of what most people do, which is put a turbo for power, I was wanting to swap out the 2.5 engine with a flat 6 engine from forester. They have the 3.0 and a 3.6 from what I saw. I was wondering if this is possible and if so, what are the hurdles I would need to go over in order to get this done. I just wanted a flat 6 because I'm trying to turn my 2017 forester into a unique overlanding vehicle. Putting rally rims and BF goodrich ko2 tires and a 2 inch lift for starters. But I know for a fact it will impact the power greatly with only those modifications. That is not including the roof top rack with a roof top tent. I really am not trying to acheive an STI swap for speed. I guess more for hauling.

Yes I know, everyone says "just add a turbo, it's easier and cheaper". But I want a flat 6. Maybe even later, put a turbo paired with the flat 6 running lower boost levels. But turbo is not important for now. I have a 2017 forester with UEL headers and a CVT transmission. Is my dream just a dream or can it be a reality? Will someone give me some clear answers or any answer at all? Much appreciated :thumbsup:

Also to be clear, I don't want to buy the outback, or legacy or tribeca. I want the forester body which is why I even thought of this ridiculous idea haha

and yes I know it's been done, but I've only ever seen it done on a older model foresters and not the newer model ones.

-Matt
 

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Premium Member
2019 Crosstrek 2018 XT
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14,573 Posts
I would think the electronics alone would make it impossible. I think its a 100% total pipe dream. And of course there is little matter of warranty which no longer exists.

Welcome
 

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2017 Forester XT Premium
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492 Posts
I'm of the school of never say never. If you have enough money just about anything can be done.
 

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2010 Forester 2.5 XPremium 4EAT
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863 Posts
Seek out a dirt cheap Tribeca and customize / modify the car to your wishes - it'll already have the flat 6 in it.
 

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2004 Forester XT 4EAT
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1,320 Posts
And don't go the turbo route....these NA engines don't much care for it....and swapping in a FA20DIT would also entail a whole bunch of wiring that would likely not end well.

Oh, for the good ol' days........of HG issues.
 

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Discussion Starter #8
Sigh...*looks at my forester* it's okay Fozzy. Even with the lack of power or turbo, I still love you.
 

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2016 and 2020 Foresters
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1,366 Posts
Yes I know, everyone says "just add a turbo, it's easier and cheaper"
Nobody with any knowledge of the N/A engines say that. They will say to buy a factory turbo. It's a very different engine.

Regarding the H6 swap, it can be done. It is basically a complete gutting of the car and transferring everything from a donor vehicle (like a Tribeca). Engine, transmission, diff, ECU, axles, hubs, wiring harness, etc. etc. Everything.

Personally, even if I had money to burn and time to waste, I'd still be very reluctant to do such a thing simply due to the fact that it is a huge project and I'd be hesitant to ever depend on such a vehicle. I'd only do it as a fun side project car. But, IMO there are much more interesting side projects than an H6 forester.

So, while it would be impressive to do an H6 swap in an SJ forester, it would subjectively be something of a fool's errand.
 

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2017 Forester XT Premium
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550 Posts
You got money to burn? PSI Performance in Lansdale PA will do a LS swap in your Forester.. I thik they have done two Foresters, or are still in progress. 50K +
 

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Discussion Starter #12
I'd only do it as a fun side project car. But, IMO there are much more interesting side projects than an H6 forester.

So, while it would be impressive to do an H6 swap in an SJ forester, it would subjectively be something of a fool's errand.
I would have to say with all the info I've got that I really agree with this. Definitely seems like there's a lot of other builds that would be more worth it. Time:reward ratio.

Yeah maybe I'll join the LS swap the world movement.
 

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2009 Lifted Sh. 4eat, vtd, r180, 4.44
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52 Posts
i did a h6 swap into my sg. 4" lift big tyres rack 4.44, r180 etc it went amazingly well. i sold it over the weekend and im about to do the same in a sh. should be much more similar to a sj. will let you know how it goes.
 
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