FMF Megabomb Titanium Header
MSRP: $349.99
$279.99
Exact Fitment Guarantee
The FMF Megabomb Titanium Header is a patented, high-performance exhaust header engineered to replace straight-pipe OEM headers, unlocking significant mid-to-top end power gains while lowering exhaust decibel output. The defining engineering feature of the Megabomb is its enlarged secondary expansion module located along the primary pipe. This scientifically calculated chamber acts as an acoustic diffuser and exhaust pulse resonator, allowing high-velocity exhaust gases to expand and decelerate momentarily before converging back into the main stream.
Fabricated exclusively from premium aerospace-grade titanium, the Megabomb delivers an impressive strength-to-weight ratio and rapid thermal dissipation. The resonance effect creates an effective exhaust scavenging pulse that extracts residual exhaust gases from the combustion chamber more thoroughly during the valve overlap phase. On the track, this mechanical scavenging translates to noticeable low-end torque improvement, enhanced mid-range throttle response, and a reduction in exhaust noise by up to 1.5 dB. The lower acoustic footprint provides a deeper, throatier exhaust tone while reducing rider acoustic fatigue during long motos.
- Material: Aerospace-grade lightweight titanium alloy
- Chamber Design: Patented Megabomb sonic diffuser expansion chamber
- Header Geometry: Precision mandrel-bent stepped diameter profile
- Flange Type: CNC-machined titanium cylinder head mounting collar
- Sound Attenuation: Lowers exhaust sound output by up to 1.5 dB across operating RPMs
### Step-by-Step Installation & Safety Protocols Installation requires careful attention to exhaust sealing and engine clearance. Remove the right-side shrouds, side panel, and disconnect the existing header from the cylinder head exhaust port and mid-pipe junction. Inspect the copper exhaust port crush gasket inside the cylinder head; always replace with a new OEM crush gasket to guarantee an airtight seal. Mount the FMF Megabomb header loosely onto the exhaust studs using factory flange nuts. Connect the mid-pipe, align the header to ensure adequate clearance around radiator hoses and the frame downtube, and tighten the cylinder head exhaust flange nuts evenly to 12-15 Nm (do not over-tighten, which can strip cylinder head studs). Wipe down the titanium tubing with rubbing alcohol before starting the engine to remove fingerprints, which will permanently bake into the titanium finish.
### Maintenance & Inspection Guidelines Maintenance includes inspecting the header for dents from front-wheel roost and checking flange nuts periodically for proper torque. Clean with mild soap or rubbing alcohol when cold to maintain the natural titanium heat-anodized finish.
Frequently Asked Questions
Q: How does the Megabomb header lower sound while making more power?
A: The patented expansion chamber increases the internal surface area and changes the acoustic frequency of the exhaust pulse, effectively dissipating sound waves while creating an optimal low-pressure scavenging wave that pulls more fresh fuel-air charge into the cylinder.
Q: Will the FMF Megabomb header work with my stock OEM silencer?
A: Yes, the Megabomb is designed with factory-matched inlet and outlet diameters, allowing it to pair with either the OEM silencer or an aftermarket FMF Factory 4.1 RCT slip-on.
Q: Why is it critical to clean the header before the first engine run?
A: Fingerprints contain natural skin oils that permanently burn into raw titanium under extreme exhaust temperatures, causing permanent stained blotches. Cleaning with isopropyl alcohol ensures a clean, uniform gold-and-blue heat color transition.
Q: Does the Megabomb interfere with aftermarket skid plates or oversized radiators?
A: FMF designs the Megabomb header to closely follow factory routing, providing ample clearance for standard aftermarket skid plates, engine guards, and radiator braces.