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Quantity
1
Description
Part Number: 309-562
ThunderMax is a performance-driven, award-winning ECM built exclusively for EFI-equipped Harley-Davidson® motorcycles. Designed as a stand-alone replacement for the factory ECM, the 309-562 arrives fully assembled with...
Reviews
4.6
7 ratings
5
4
3
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1
Perfect
K
Kenneth · May 12, 2026
Can't use on stock head pipes and it's a 15% restock fee to return it.