The top cap and air cap for the 2020-2022 Pike B3-B4 are not available individually, but are sold as a kit. That kit is part number 11.4018.083.000 (FORK SPRING AIR TOP CAP - 35MM (.5MM THREAD PITCH) BOOST™ 15X110 (INCLUDES SPLINED TOP CAP, VALVE COVER) - LYRIK A1+/YARI A1+/PIKE B1+/REVELATION A1+(35MM)/BOXXER 35MM/SID35MM).
If you only need an air cap and don’t want to purchase the complete kit, you can instead use part number 11.4118.107.000 (SCHRADER AIR CAP - (INCLUDES CAP AND O-RING) - ROCKSHOX UNIVERSAL AIR CAP FOR FORKS AND SHOCKS), which is our universal air cap.
RockShox service kits and spare parts are best obtained through your local shop or dealer. See our dealer locator, below, to find a dealer near you. If no one is currently listed near you, then please search for local shops via your preferred web browser.
https://www.sram.com/en/dealer-locator
Manuals and additional information about RockShox and SRAM components can be found at our service site, linked below.
https://www.sram.com/en/service
Further questions?
Reach out to Rider Support by Asking A Question at the link below.
https://www.sram.com/en/rockshox/campaigns/rockshox-rider-support