Modifies both factory Z32 Twin Turbo recirculation valves to increase internal spring pressure while retaining the factory recirculation plumbing. Installation requires cutting the diaphragm canister tops and sealing the machined aluminum caps with RTV. This is a modification kit, not a pair of replacement recirculation valves.
Supplier-sourced item. Availability and dispatch timing are confirmed by Z Shack; supplier inventory is not live-synced.
Manufacturer part number: BDE-6500
