Flat-plane cranks have been around for a long, long time, mainly in racing applications where the vibes are less important than the outright power of the thing. ... Most four-cylinder donks use a flat-plane crank and so do engines like the boxer four or six as seen in VW Beetles, Suby WRXs and Porsche 911s.8 Jan 2016
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How much does it cost to replace Porsche IMS bearing?
The cost of a IMS Retrofit replacement bearing and labour for installation is usually more than $4,000 but can be done in conjunction with the clutch. This is a small investment compared to the cost of rebuilding or replacing the entire engine.