The air-to-water intercooler keeping IAT's low is a system

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the choice ultimately comes down to personal preference

BMW E89 Z4 18i

Choice of heavy-duty VANOS hub or VANOS delete kit

BMW S65 Stroker Rod Bearing Set by 5150 AutoSport 1050.48.14.14.8 The air-to-water intercooler keeping IAT'sDesigned for high performance S65 Stroker builds, 5150 High Performance Coated Rod Bearing Sets deliver unmatched durability and power. These rod bearings feature Calico coatings that significantly reduce friction, enabling your BMW S65 engine to generate more power while resisting spinning under extreme conditions. Please note: These bearings feature a special design for use with our S65 stroker kit. They are NOT compatible with OEM connecting rods