Allstar Performance Birdcage LH XP Black, 2.760 in ID bearing, single bearing design, aluminum construction with black anodized finish, hardware included, sold each. Center-pull birdcages are one of the most innovative cage designs — the XP design eliminates bind on the bearing and reduces drag, allowing for better weight and horsepower transfer. Must be used with XP rear torsion arms.
Spec Sheet: Allstar XP Aluminum Birdcages Spec Sheet
Compatibility
Left-side XP birdcage; must be run with Allstar XP rear torsion arms, not standard torsion arms. Replacement components confirmed by Allstar's spec sheet: Birdcage Spud (ALL55052), Sprint Birdcage Bearing 28mm (ALL72336), and Arm Bolt for XP Birdcage (ALL55056). The right-side match is ALL55039.
FAQ
Does this birdcage require special torsion arms?
Yes — the XP birdcage must be used with Allstar XP rear torsion arms, not standard torsion arms.
What is the benefit of the XP design over a standard birdcage?
Allstar states the center-pull XP design eliminates bind on the bearing and reduces drag, improving weight and horsepower transfer.
What is the matching right-side part number?
ALL55039 is the right-side XP birdcage that pairs with this left-side unit.

