MMX Performance Charge Pipe Kit - BMW B58The MMR high flow charge pipe kit includes everything you need to improve the performance, reliability, and aesthetics of your F20 or F30 B58 powered M140 240 340 or M440. With increased boost pressure the B58's cheap standard plastic pipework can be prone to splitting or cracking it's more a question of 'if' than 'when' you'll experience boost leaks. By fitting the MMR lightweight aluminum replacement Charge Pipes, you can be assured of reliability