The issue some owners have experienced is road debris that impacted the OE belly pan hard enough to crack the oil cooler

they've entirely replaced the slim stock core and plastic end tanks with a full aluminum

358     34/26

Chassis & Body Control

catastrophic engine failure

B58 5-Axis CNC Cylinder Head Porting by 5150 AutoSport scr5150 The issue some owners have5150 AutoSport 5 Axis CNC Cylinder Head Porting for BMW Toyota B58 Engines Please note that price is based on customer providing disassembled, clean core. If you need help sourcing a core, please contact our sales team. Also note that this service includes a 1 2 week turnaround time for service completion, beginning when the 5150 Team receives your head. Investing in cylinder head porting for your high performance BMW engine enhances airflow