diff --git a/ReactAndroid/src/main/jni/xreact/jni/CatalystInstanceImpl.cpp b/ReactAndroid/src/main/jni/xreact/jni/CatalystInstanceImpl.cpp
index 2a95a01b7..8ba8f98f3 100644
--- a/ReactAndroid/src/main/jni/xreact/jni/CatalystInstanceImpl.cpp
+++ b/ReactAndroid/src/main/jni/xreact/jni/CatalystInstanceImpl.cpp
@@ -14,6 +14,8 @@
 #include <jni/LocalReference.h>
 
 #include <cxxreact/Instance.h>
+#include <cxxreact/JSBundleType.h>
+#include <cxxreact/JSIndexedRAMBundle.h>
 #include <cxxreact/MethodCall.h>
 #include <cxxreact/ModuleRegistry.h>
 
@@ -174,10 +176,32 @@ void CatalystInstanceImpl::loadScriptFromAssets(jobject assetManager,
   }
 }
 
+bool CatalystInstanceImpl::isIndexedRAMBundle(const char *sourcePath) {
+  std::ifstream bundle_stream(sourcePath, std::ios_base::in);
+  if (!bundle_stream) {
+    return false;
+  }
+  BundleHeader header;
+  bundle_stream.read(reinterpret_cast<char *>(&header), sizeof(header));
+  bundle_stream.close();
+  return parseTypeFromHeader(header) == ScriptTag::RAMBundle;
+}
+
 void CatalystInstanceImpl::loadScriptFromFile(jni::alias_ref<jstring> fileName,
                                               const std::string& sourceURL) {
-  return instance_->loadScriptFromFile(fileName ? fileName->toStdString() : "",
-                                       sourceURL);
+
+  std::string file = fileName ? fileName->toStdString() : "";
+
+  if (isIndexedRAMBundle(file.c_str())) {
+    auto bundle = folly::make_unique<JSIndexedRAMBundle>(file.c_str());
+    auto startupScript = bundle->getStartupCode();
+    instance_->loadUnbundle(
+      std::move(bundle),
+      std::move(startupScript),
+      sourceURL);
+  } else {
+    instance_->loadScriptFromFile(file, sourceURL);
+  }
 }
 
 void CatalystInstanceImpl::loadScriptFromOptimizedBundle(const std::string& bundlePath,
diff --git a/ReactAndroid/src/main/jni/xreact/jni/CatalystInstanceImpl.h b/ReactAndroid/src/main/jni/xreact/jni/CatalystInstanceImpl.h
index 0de2cec31..674ca8766 100644
--- a/ReactAndroid/src/main/jni/xreact/jni/CatalystInstanceImpl.h
+++ b/ReactAndroid/src/main/jni/xreact/jni/CatalystInstanceImpl.h
@@ -40,6 +40,8 @@ class CatalystInstanceImpl : public jni::HybridClass<CatalystInstanceImpl> {
 
   CatalystInstanceImpl();
 
+  static bool isIndexedRAMBundle(const char *sourcePath);
+
   void initializeBridge(
       jni::alias_ref<ReactCallback::javaobject> callback,
       // This executor is actually a factory holder.
diff --git a/ReactCommon/cxxreact/Android.mk b/ReactCommon/cxxreact/Android.mk
index 17e4dcef9..05ac4e14b 100644
--- a/ReactCommon/cxxreact/Android.mk
+++ b/ReactCommon/cxxreact/Android.mk
@@ -9,6 +9,7 @@ LOCAL_SRC_FILES := \
   Executor.cpp \
   Instance.cpp \
   JSCExecutor.cpp \
+  JSBundleType.cpp \
   JSCLegacyProfiler.cpp \
   JSCLegacyTracing.cpp \
   JSCMemory.cpp \
@@ -16,6 +17,7 @@ LOCAL_SRC_FILES := \
   JSCPerfStats.cpp \
   JSCTracing.cpp \
   JSCWebWorker.cpp \
+  JSIndexedRAMBundle.cpp \
   MethodCall.cpp \
   ModuleRegistry.cpp \
   NativeToJsBridge.cpp \