How to Install BBK Off-Road X-Pipe - 2.75 in. on your Mustang

Follow these instructions carefully to ensure correct fitment and operation.

STEP 1: Disconnect the negative battery terminal.

STEP 2: With BBK Full Length Headers # 1641, 16410 or 16495 installed, lift the BBK X-Pipe into place.

STEP 3: Line up the rear of the X-Pipe with the stock barrel style clamps and slip the clamps over the reduced end of the X-Pipe.

STEP 4: Position the X-Pipe collector flanges up to the headers, connect the X-Pipe with the studs provided in the header kit installed into the header collector flanges. Slide studs thru the holes in the X-Pipe flanges and install nuts and washers.

STEP 5 & Step 6: Adjust position of exhaust system for fitment and clearance. Tighten barrel style clamps and collector nuts.

Remove the rear oxygen sensors from the Stock Pipes and install them into the BBK X-Pipe. NOTE!!! Be sure to add a small amount of anti-seize to the top thread of each oxygen sensor using the supplied anti-seize packet. As you thread the oxygen sensor back into the part the anti-seize will spread evenly throughout the threads.

STEP 7: Connect the supplied oxygen sensor extensions to the sensor and the wire harness at the transmission.

STEP 8: Reconnect the battery and start the engine and listen for any leaks.

Hardware Included

- 1676

   -  CHD241 18” Oxygen Sensor Extension (2pcs)