Ignitions and Electrical Charging Systems

TwinPower

Twin Power 91-06 Big Twin Exc 06 Dyna Transmission Mainshaft Seal Replaces H-D 12035A 5 Pk

$27.44

SKU: T09O 043289

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The FMF Racing PowerBomb 043289 is a redesigned four-stroke header designed to increase performance and flow. It incorporates FMF's patented PowerBomb module in the initial stage of the header. This module allows exhaust sonics to expand and contract, resulting in a flow increase of nearly 10%. The outer chamber of the PowerBomb helps the air expand and cool before ramping back up at a higher velocity.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandTwinPower
Part NumberT09O 043289

Videos

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy