The S55 twin-turbo engine that powers the BMW M2C / M3 / M4 F8X is equipped with plastic intercooler pipes on both the hot and cold side. These pipes are a weak link on any tuned car or in some cases even on a stock tune. The OE plastic pipes often crack and split leaving you with a boost leak.

The DO88 performance intercooler J-pipe offers a solution for improved reliability and at the same time minimize the restrictions by improving the air flow!

DO88 did a detailed 3D-scan of the M3 Competition engine bay. With the help of this 3D-scan model DO88 created a smooth cast J-pipe. Most aftermarket J-pipes on the market are made of bent pipes, cut, and welded in several pieces to achieve the shape. 

The DO88 J-pipe is a super durable, 3.5” (89mm) casting, which improves the airflow. It has a free form shape with same diameter all the way to the throttle body which is impossible to achieve with mandrel bent pipe. 

The DO88 J-pipe also features two methanol injection connection (1/8 -27 NPT) which is blanked off with plugs. A more durable silicone hose is also included together with matte black hose clamps for a clean stealthy look. A new C-clip is included to fasten the J-pipe to the throttle body instead of the flimsy OE plastic retaining clip.