Blackbird Racing Seat Foam (4406S) is a waterproof polyurethane replacement foam designed to be perfectly interchangeable with the original seat foam. Its increased stiffness helps shift rider balance and supports faster, more controlled riding.
Upgrade your seat feel and rider control with Blackbird Racing Seat Foam (4406S). Made from waterproof polyurethane foam and designed to be perfectly interchangeable with the original, this foam is an ideal choice when your stock foam is worn out, waterlogged, or no longer provides the support you need. With increased stiffness, it helps you shift and balance your weight more effectively—supporting a more stable riding position and quicker body movement on the bike.
If you’re rebuilding a seat, refreshing your bike, or simply want a firmer platform that holds up to demanding conditions, this standard-height foam delivers a consistent OEM-style profile while improving support where it matters most.
