diff --git a/.changeset/fix-tcp-regression-connect-pass-through.md b/.changeset/fix-tcp-regression-connect-pass-through.md
new file mode 100644
index 000000000000..c462ba6f23f0
--- /dev/null
+++ b/.changeset/fix-tcp-regression-connect-pass-through.md
@@ -0,0 +1,6 @@
+---
+"miniflare": patch
+"wrangler": patch
+---
+
+Strip the `CF-Connecting-IP` header from outgoing fetches
diff --git a/packages/miniflare/src/plugins/core/index.ts b/packages/miniflare/src/plugins/core/index.ts
index 07a1c6b65a03..7894ff2435a8 100644
--- a/packages/miniflare/src/plugins/core/index.ts
+++ b/packages/miniflare/src/plugins/core/index.ts
@@ -163,9 +163,7 @@ const CoreOptionsSchemaInput = z.intersection(
 		unsafeEnableAssetsRpc: z.boolean().optional(),
 
 		// Strip the CF-Connecting-IP header from outbound fetches
-		// There is an issue with the connect() API and the globalOutbound workerd setting that impacts TCP ingress
-		// We should default it to true once https://github.com/cloudflare/workerd/pull/4145 is resolved
-		stripCfConnectingIp: z.boolean().default(false),
+		stripCfConnectingIp: z.boolean().default(true),
 	})
 );
 export const CoreOptionsSchema = CoreOptionsSchemaInput.transform((value) => {
@@ -759,6 +757,7 @@ export const CORE_PLUGIN: Plugin<
 						},
 					],
 					compatibilityDate: "2025-01-01",
+					compatibilityFlags: ["connect_pass_through", "experimental"],
 					globalOutbound: getGlobalOutbound(workerIndex, options),
 				},
 			});
diff --git a/packages/miniflare/test/index.spec.ts b/packages/miniflare/test/index.spec.ts
index 5c364e5cd6d8..674e7425050f 100644
--- a/packages/miniflare/test/index.spec.ts
+++ b/packages/miniflare/test/index.spec.ts
@@ -2715,7 +2715,6 @@ test("Miniflare: strips CF-Connecting-IP", async (t) => {
 	const client = new Miniflare({
 		script: `export default { fetch(request) { return fetch('${url.href}', {headers: {"CF-Connecting-IP":"fake-value"}}) } }`,
 		modules: true,
-		stripCfConnectingIp: true,
 	});
 	t.teardown(() => client.dispose());
 	t.teardown(() => server.dispose());
diff --git a/packages/wrangler/src/__tests__/api/startDevWorker/startWorker.test.ts b/packages/wrangler/src/__tests__/api/startDevWorker/startWorker.test.ts
deleted file mode 100644
index 88cc48988950..000000000000
--- a/packages/wrangler/src/__tests__/api/startDevWorker/startWorker.test.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import http from "node:http";
-import path from "node:path";
-import dedent from "ts-dedent";
-import { startWorker } from "../../../api/startDevWorker";
-import { runInTempDir } from "../../helpers/run-in-tmp";
-import { seed } from "../../helpers/seed";
-
-describe("startWorker", () => {
-	runInTempDir();
-
-	// We do not inject the `CF-Connecting-IP` header on Windows at the moment.
-	// See https://github.com/cloudflare/workerd/issues/3310
-	it.skipIf(process.platform === "win32")(
-		"strips the CF-Connecting-IP header from all outbound requests",
-		async (t) => {
-			const server = http.createServer((req, res) => {
-				res.writeHead(200);
-				res.end(
-					req.headers["cf-connecting-ip"] ?? "CF-Connecting-IP header stripped"
-				);
-			});
-
-			t.onTestFinished(() => {
-				server.close();
-			});
-
-			const address = server.listen(0).address();
-
-			if (address === null || typeof address === "string") {
-				expect.fail("Failed to get server address");
-			}
-
-			await seed({
-				"src/index.ts": dedent`
-					export default {
-						fetch(request) {
-							if (request.headers.has('CF-Connecting-IP')) {
-								return fetch(request);
-							}
-
-							return new Response("No CF-Connecting-IP header");
-						}
-					}
-				`,
-			});
-
-			const worker = await startWorker({
-				name: "test-worker",
-				entrypoint: path.resolve("src/index.ts"),
-			});
-
-			t.onTestFinished(() => worker.dispose());
-
-			const response = await worker.fetch(`http://127.0.0.1:${address.port}`);
-			await expect(response.text()).resolves.toEqual(
-				"CF-Connecting-IP header stripped"
-			);
-		}
-	);
-});
diff --git a/packages/wrangler/src/deployment-bundle/bundle.ts b/packages/wrangler/src/deployment-bundle/bundle.ts
index 8f972f94c9b1..72dd75d24912 100644
--- a/packages/wrangler/src/deployment-bundle/bundle.ts
+++ b/packages/wrangler/src/deployment-bundle/bundle.ts
@@ -304,32 +304,6 @@ export async function bundleWorker(
 		inject.push(checkedFetchFileToInject);
 	}
 
-	// We injected the `CF-Connecting-IP` header in the entry worker on Miniflare.
-	// It used to be stripped by Miniflare, but that caused TCP ingress failures
-	// because of the global outbound setup. This is a temporary workaround until
-	// a proper fix is landed in Workerd.
-	// See https://github.com/cloudflare/workers-sdk/issues/9238 for more details.
-	if (targetConsumer === "dev" && local) {
-		const stripCfConnectingIpHeaderFileToInject = path.join(
-			tmpDir.path,
-			"strip-cf-connecting-ip-header.js"
-		);
-
-		if (!fs.existsSync(stripCfConnectingIpHeaderFileToInject)) {
-			fs.writeFileSync(
-				stripCfConnectingIpHeaderFileToInject,
-				fs.readFileSync(
-					path.resolve(
-						getBasePath(),
-						"templates/strip-cf-connecting-ip-header.js"
-					)
-				)
-			);
-		}
-
-		inject.push(stripCfConnectingIpHeaderFileToInject);
-	}
-
 	// When multiple workers are running we need some way to disambiguate logs between them. Inject a patched version of `globalThis.console` that prefixes logs with the worker name
 	if (getFlag("MULTIWORKER")) {
 		middlewareToLoad.push({
diff --git a/packages/wrangler/templates/strip-cf-connecting-ip-header.js b/packages/wrangler/templates/strip-cf-connecting-ip-header.js
deleted file mode 100644
index a011710ccf80..000000000000
--- a/packages/wrangler/templates/strip-cf-connecting-ip-header.js
+++ /dev/null
@@ -1,13 +0,0 @@
-function stripCfConnectingIPHeader(input, init) {
-	const request = new Request(input, init);
-	request.headers.delete("CF-Connecting-IP");
-	return request;
-}
-
-globalThis.fetch = new Proxy(globalThis.fetch, {
-	apply(target, thisArg, argArray) {
-		return Reflect.apply(target, thisArg, [
-			stripCfConnectingIPHeader.apply(null, argArray),
-		]);
-	},
-});