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Porsche Mezger 3.8L Flat-Six Long Block
3.8L Flat-6 · 435 hp · 317 lb-ft
Used6 mo warranty
$34,500
Only 1 left
BMW · S Series family
Part number BMW-S55-U41
Only 1 left · 1 in inventory
Pulled from a 2018 F80 M3 with 41,000 documented kilometres and a full BMW service history. Compression and leak-down sheets are in the listing photos. Closed-deck block, forged crank, and the twin mono-scroll turbos that made the S55 a 700 hp platform on stock internals.
This list is not exhaustive. If your chassis is not here, ask — most swaps come down to mounts and sump clearance.
Tell us the chassis and the transmission. We will tell you what clears, what needs mounts, and what to avoid.
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3.8L Flat-6 · 435 hp · 317 lb-ft
Only 1 left
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