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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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03-13-2018, 08:10 AM | #1 |
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FB25 VS FA20
hello! fa20 exhaust manifold to fb25 , will it fit?
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03-13-2018, 08:23 AM | #2 |
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Yes same block height the F series are modular.
you can bolt a set of BRZ heads on a FB25 block, they have the same head bolt pattern. Unknown at least to me is the front cover bolts and how they line up. between the 2 engines. I should pop the hood on the 2018 Legacy 2.5i and take a peek at the cover to compare.
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03-13-2018, 08:30 AM | #3 |
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thanks! im interesting how brz exhaust manifold better then rxhaust manifold fb25 engine
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03-13-2018, 08:52 AM | #4 |
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Problem is the exhaust routing and engine cradle location differ in the 2 chassis. Not sure everything will line up the same.
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03-13-2018, 09:40 AM | #5 | |
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03-13-2018, 09:52 AM | #6 |
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In theory yes. I have been trying to locate a FB25 since about 2013 to confirm fitment. I have not validated the setup yet.
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03-13-2018, 11:03 AM | #7 | |
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03-13-2018, 01:28 PM | #8 |
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03-13-2018, 02:54 PM | #9 |
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The FB25 is actually worse shorter rods crappy rod to stroke ratio and smaller thinner rod bearings
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03-13-2018, 02:55 PM | #10 | |
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I really want to switch it up for a 2.5 build if someone will by my 2.3
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03-13-2018, 03:01 PM | #11 |
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03-13-2018, 03:05 PM | #12 |
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03-13-2018, 03:05 PM | #13 |
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The FB25 wasn't supposed to be a performance motor.
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03-13-2018, 03:33 PM | #14 |
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