diff --git a/arrs-4k/README.md b/arrs-4k/README.md
index 9b68b9d..547aceb 100644
--- a/arrs-4k/README.md
+++ b/arrs-4k/README.md
@@ -21,6 +21,11 @@ idempotent, changed=0).
   1080p radarr was mislabeled `is4k=true` and was flipped to `is4k=false` (non-4k default).
 - **Plex**: SEPARATE libraries `Movies - 4K` (/data/media/movies-4k) + `TV - 4K` (/data/media/tv-4k),
   not merged into the 1080p libraries.
+- **Download clients** (added post-Step-1, packaged in the playbook via `ensure-arrs-4k-dl.py`):
+  SABnzbd + Transmission on both instances, DISTINCT categories to avoid cross-import with 1080p —
+  sabnzbd `movies-4k`/`tv-4k`, transmission `radarr-uhd`/`sonarr-uhd` (Transmission category forbids digits).
+  Completed paths under /data (hardlinks intact).
+- **Homepage**: separate `Radarr 4K`/`Sonarr 4K` tiles in Media Automation (keys via HOMEPAGE_VAR, siteMonitor).
 - **Traefik**: file-provider routers (see traefik-router snippet), NOT docker labels.
 - **Tdarr**: does NOT watch movies-4k/tv-4k (its libraries are the specific 1080p /media/movies,
   /media/tv) — quality-first keeps the grabbed file.
diff --git a/arrs-4k/deploy-arrs-4k.yml b/arrs-4k/deploy-arrs-4k.yml
index 87193c0..a144837 100644
--- a/arrs-4k/deploy-arrs-4k.yml
+++ b/arrs-4k/deploy-arrs-4k.yml
@@ -84,3 +84,76 @@
     - name: Result
       ansible.builtin.debug:
         msg: "arrs-4k {{ 'running (changed)' if r.changed else 'already up (no-op)' }}"
+
+    - name: Wait for 4K arr APIs (ports)
+      ansible.builtin.wait_for:
+        host: 192.168.99.183
+        port: "{{ item }}"
+        timeout: 90
+      loop: [7879, 8990]
+
+    - name: Install 4K download-client config script
+      ansible.builtin.copy:
+        dest: "{{ app_dir }}/ensure-arrs-4k-dl.py"
+        owner: tommy
+        group: tommy
+        mode: "0755"
+        content: |
+          #!/usr/bin/env python3
+          # Idempotent: ensure the 4K arr download clients + sabnzbd categories exist.
+          # Reads RADARR4K_KEY / SONARR4K_KEY / SAB_KEY from env. Prints CHANGED or NOCHANGE.
+          import os, json, urllib.request
+          H = "http://192.168.99.183"
+          SAB = os.environ["SAB_KEY"]
+          changed = False
+          
+          def sab_cats():
+              return json.load(urllib.request.urlopen(f"{H}:8081/api?mode=get_cats&output=json&apikey={SAB}"))["categories"]
+          def sab_add(cat):
+              urllib.request.urlopen(f"{H}:8081/api?mode=set_config&section=categories&keyword={cat}&dir={cat}&apikey={SAB}").read()
+          def dc_get(port, key):
+              return json.load(urllib.request.urlopen(urllib.request.Request(f"{H}:{port}/api/v3/downloadclient", headers={"X-Api-Key": key})))
+          def dc_post(port, key, body):
+              urllib.request.urlopen(urllib.request.Request(f"{H}:{port}/api/v3/downloadclient",
+                  data=json.dumps(body).encode(), method="POST", headers={"X-Api-Key": key, "Content-Type": "application/json"}))
+          
+          def sab_body(catf, catv, recent, older):
+              return {"enable": True, "protocol": "usenet", "priority": 1, "name": "SABnzbd",
+                      "implementation": "Sabnzbd", "configContract": "SabnzbdSettings",
+                      "fields": [{"name": "host", "value": "gluetun"}, {"name": "port", "value": 8080},
+                                 {"name": "apiKey", "value": SAB}, {"name": catf, "value": catv},
+                                 {"name": recent, "value": -100}, {"name": older, "value": -100}]}
+          def tr_body(catf, catv):
+              return {"enable": True, "protocol": "torrent", "priority": 1, "name": "Transmission",
+                      "implementation": "Transmission", "configContract": "TransmissionSettings",
+                      "fields": [{"name": "host", "value": "gluetun"}, {"name": "port", "value": 9091},
+                                 {"name": "urlBase", "value": "/transmission/"}, {"name": catf, "value": catv}]}
+          
+          cats = sab_cats()
+          for c in ("movies-4k", "tv-4k"):
+              if c not in cats:
+                  sab_add(c); changed = True
+          
+          plan = [
+              (7879, os.environ["RADARR4K_KEY"], [sab_body("movieCategory", "movies-4k", "recentMoviePriority", "olderMoviePriority"),
+                                                  tr_body("movieCategory", "radarr-uhd")]),
+              (8990, os.environ["SONARR4K_KEY"], [sab_body("tvCategory", "tv-4k", "recentTvPriority", "olderTvPriority"),
+                                                  tr_body("tvCategory", "sonarr-uhd")]),
+          ]
+          for port, key, bodies in plan:
+              have = {c["name"] for c in dc_get(port, key)}
+              for b in bodies:
+                  if b["name"] not in have:
+                      dc_post(port, key, b); changed = True
+          
+          print("CHANGED" if changed else "NOCHANGE")
+
+    - name: Ensure 4K download clients + sabnzbd categories (idempotent, cats movies-4k/tv-4k)
+      ansible.builtin.command: "python3 {{ app_dir }}/ensure-arrs-4k-dl.py"
+      environment:
+        RADARR4K_KEY: "{{ vault_radarr4k_apikey }}"
+        SONARR4K_KEY: "{{ vault_sonarr4k_apikey }}"
+        SAB_KEY: "{{ vault_sabnzbd_apikey }}"
+      register: dl_result
+      changed_when: "'CHANGED' in dl_result.stdout"
+      no_log: true
diff --git a/homepage/services.yaml b/homepage/services.yaml
index 4e94875..b960b30 100644
--- a/homepage/services.yaml
+++ b/homepage/services.yaml
@@ -55,6 +55,25 @@
           type: radarr
           url: http://radarr:7878
           key: {{HOMEPAGE_VAR_RADARR_KEY}}
+    - Radarr 4K:
+        icon: radarr.png
+        href: https://radarr-4k.goattw.net
+        description: 4K Movies (quality-first)
+        siteMonitor: https://radarr-4k.goattw.net
+        widget:
+          type: radarr
+          url: http://radarr-4k:7878
+          key: {{HOMEPAGE_VAR_RADARR4K_KEY}}
+
+    - Sonarr 4K:
+        icon: sonarr.png
+        href: https://sonarr-4k.goattw.net
+        description: 4K TV (quality-first)
+        siteMonitor: https://sonarr-4k.goattw.net
+        widget:
+          type: sonarr
+          url: http://sonarr-4k:8989
+          key: {{HOMEPAGE_VAR_SONARR4K_KEY}}
 
     - Prowlarr:
         icon: prowlarr.png