FMF PowerBomb Stainless Steel Header Pipe 044033 for Yamaha YFZ450 and YZ450F

The FMF Power Bomb is a four stroke header pipe unit that has a unique bulge precisely located in the header system. A "pre muffler" of sorts, the Power Bomb actually lowers sound output because it creates more surface area to absorb the sound medium (exhaust). The surface area of the perforated core lets the sound exit into the absorbing material (steel wool packing) and then allows the air to expand, cool and ramp back up with the higher pressure air. The result? The FMF Power Bomb is instrumental in reducing the decibel level on any four stroke and because of the expansion and contraction on exhaust through the system, the flow has been increased by nearly 10%. That means more power throughout the range.

The FMF PowerBomb Stainless Steel Header Pipe is engineered for four-stroke Yamaha performance applications, including the Yamaha YFZ450 and YZ450F models listed below. Part number 044033 uses FMF PowerBomb technology to improve exhaust flow while helping reduce sound output. A precisely positioned expansion chamber increases surface area within the header system, allowing exhaust energy to expand, cool, and transition back into the higher-pressure air stream.

This pre-muffler-style design helps the exhaust move more efficiently through the system, contributing to stronger power delivery throughout the range. The FMF PowerBomb header is tuned for bottom-to-midrange performance, making it a practical upgrade for riders seeking improved throttle response and usable engine power. Its stainless steel construction provides a durable solution for demanding off-road and motocross conditions.

The header is designed to maintain full-service access to the oil filter, supporting routine maintenance without requiring unnecessary removal of the exhaust system. This FMF product is identified by manufacturer part number 044033 and vendor part number 044033. Fitment includes 2004–2009 and 2012–2013 Yamaha YFZ450 models, along with 2003–2004 Yamaha YZ450F models. Verify the motorcycle model and year before installation to confirm compatibility.

Features:

• Performance: FMF PowerBomb header technology is designed to improve exhaust flow and overall four-stroke engine performance.
• Power Delivery: Tuned for responsive bottom-to-midrange performance.
• Sound Control: The expansion chamber creates additional surface area to help absorb and reduce exhaust sound output.
• Construction: Durable stainless steel header pipe designed for demanding off-road use.
• Service Access: Designed to provide full access to the oil filter for routine maintenance.
• Fitment: Fits 2004–2009 and 2012–2013 Yamaha YFZ450 models and 2003–2004 Yamaha YZ450F models.
• Identification: FMF manufacturer and vendor part number 044033.

Fitment:
2003 Yamaha WR450F
2003 Yamaha YZ450F
2004 Yamaha WR450F
2004 Yamaha YFZ450
2004 Yamaha YZ450F
2005 Yamaha WR450F
2005 Yamaha YFZ450
2005 Yamaha YZ450F
2006 Yamaha WR450F
2006 Yamaha YFZ450
2006 Yamaha YZ450F
2007 Yamaha YFZ450
2008 Yamaha YFZ450
2009 Yamaha YFZ450
2012 Yamaha YFZ450
2013 Yamaha YFZ450
2014 Yamaha YFZ450
2015 Yamaha YFZ450