diff --git a/quic/core/quic_dispatcher_test.cc b/quic/core/quic_dispatcher_test.cc
index be24d26..f7f40e1 100644
--- a/quic/core/quic_dispatcher_test.cc
+++ b/quic/core/quic_dispatcher_test.cc
@@ -933,7 +933,6 @@
 TEST_F(QuicDispatcherTest, SupportedTransportVersionsChangeInFlight) {
   static_assert(QUIC_ARRAYSIZE(kSupportedTransportVersions) == 6u,
                 "Supported versions out of sync");
-  SetQuicReloadableFlag(quic_enable_version_48_2, true);
   SetQuicReloadableFlag(quic_enable_version_49, true);
   SetQuicReloadableFlag(quic_enable_version_50, true);
   SetQuicReloadableFlag(quic_enable_version_99, true);
@@ -963,16 +962,6 @@
   SetQuicReloadableFlag(quic_enable_version_49, true);
   VerifyVersionSupported(
       ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, QUIC_VERSION_49));
-
-  // Turn off version 48.
-  SetQuicReloadableFlag(quic_enable_version_48_2, false);
-  VerifyVersionNotSupported(
-      ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, QUIC_VERSION_48));
-
-  // Turn on version 48.
-  SetQuicReloadableFlag(quic_enable_version_48_2, true);
-  VerifyVersionSupported(
-      ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, QUIC_VERSION_48));
 }
 
 TEST_F(QuicDispatcherTest, RejectDeprecatedVersionsWithVersionNegotiation) {
diff --git a/quic/core/quic_version_manager.cc b/quic/core/quic_version_manager.cc
index dd6c78d..d9bc268 100644
--- a/quic/core/quic_version_manager.cc
+++ b/quic/core/quic_version_manager.cc
@@ -18,7 +18,6 @@
     : enable_version_99_(GetQuicReloadableFlag(quic_enable_version_99)),
       enable_version_50_(GetQuicReloadableFlag(quic_enable_version_50)),
       enable_version_49_(GetQuicReloadableFlag(quic_enable_version_49)),
-      enable_version_48_(GetQuicReloadableFlag(quic_enable_version_48_2)),
       enable_tls_(GetQuicReloadableFlag(quic_supports_tls_handshake)),
       allowed_supported_versions_(std::move(supported_versions)) {
   static_assert(QUIC_ARRAYSIZE(kSupportedTransportVersions) == 6u,
@@ -45,12 +44,10 @@
   if (enable_version_99_ != GetQuicReloadableFlag(quic_enable_version_99) ||
       enable_version_50_ != GetQuicReloadableFlag(quic_enable_version_50) ||
       enable_version_49_ != GetQuicReloadableFlag(quic_enable_version_49) ||
-      enable_version_48_ != GetQuicReloadableFlag(quic_enable_version_48_2) ||
       enable_tls_ != GetQuicReloadableFlag(quic_supports_tls_handshake)) {
     enable_version_99_ = GetQuicReloadableFlag(quic_enable_version_99);
     enable_version_50_ = GetQuicReloadableFlag(quic_enable_version_50);
     enable_version_49_ = GetQuicReloadableFlag(quic_enable_version_49);
-    enable_version_48_ = GetQuicReloadableFlag(quic_enable_version_48_2);
     enable_tls_ = GetQuicReloadableFlag(quic_supports_tls_handshake);
     RefilterSupportedVersions();
   }
diff --git a/quic/core/quic_version_manager.h b/quic/core/quic_version_manager.h
index 45e6e95..79e5898 100644
--- a/quic/core/quic_version_manager.h
+++ b/quic/core/quic_version_manager.h
@@ -47,8 +47,6 @@
   bool enable_version_50_;
   // quic_enable_version_49 flag
   bool enable_version_49_;
-  // quic_enable_version_48_2 flag
-  bool enable_version_48_;
   // quic_supports_tls_handshake flag
   bool enable_tls_;
 
diff --git a/quic/core/quic_version_manager_test.cc b/quic/core/quic_version_manager_test.cc
index 0822ac3..a01316f 100644
--- a/quic/core/quic_version_manager_test.cc
+++ b/quic/core/quic_version_manager_test.cc
@@ -21,16 +21,11 @@
   SetQuicReloadableFlag(quic_enable_version_99, false);
   SetQuicReloadableFlag(quic_enable_version_50, false);
   SetQuicReloadableFlag(quic_enable_version_49, false);
-  SetQuicReloadableFlag(quic_enable_version_48_2, false);
   QuicVersionManager manager(AllSupportedVersions());
 
   EXPECT_EQ(FilterSupportedTransportVersions(AllSupportedTransportVersions()),
             manager.GetSupportedTransportVersions());
 
-  EXPECT_EQ(QuicTransportVersionVector({QUIC_VERSION_46, QUIC_VERSION_43}),
-            manager.GetSupportedTransportVersions());
-
-  SetQuicReloadableFlag(quic_enable_version_48_2, true);
   EXPECT_EQ(QuicTransportVersionVector(
                 {QUIC_VERSION_48, QUIC_VERSION_46, QUIC_VERSION_43}),
             manager.GetSupportedTransportVersions());
diff --git a/quic/core/quic_versions.cc b/quic/core/quic_versions.cc
index ceed580..4ac7560 100644
--- a/quic/core/quic_versions.cc
+++ b/quic/core/quic_versions.cc
@@ -274,10 +274,6 @@
       if (GetQuicReloadableFlag(quic_enable_version_49)) {
         filtered_versions.push_back(version);
       }
-    } else if (version.transport_version == QUIC_VERSION_48) {
-      if (GetQuicReloadableFlag(quic_enable_version_48_2)) {
-        filtered_versions.push_back(version);
-      }
     } else {
       filtered_versions.push_back(version);
     }
@@ -482,9 +478,6 @@
   if (parsed_version.transport_version == QUIC_VERSION_49) {
     SetQuicReloadableFlag(quic_enable_version_49, true);
   }
-  if (parsed_version.transport_version == QUIC_VERSION_48) {
-    SetQuicReloadableFlag(quic_enable_version_48_2, true);
-  }
 }
 
 #undef RETURN_STRING_LITERAL  // undef for jumbo builds
diff --git a/quic/core/quic_versions_test.cc b/quic/core/quic_versions_test.cc
index d3a118d..93cd4aa 100644
--- a/quic/core/quic_versions_test.cc
+++ b/quic/core/quic_versions_test.cc
@@ -280,7 +280,6 @@
   QuicTransportVersionVector all_versions = AllSupportedTransportVersions();
   static_assert(QUIC_ARRAYSIZE(kSupportedTransportVersions) == 6u,
                 "Supported versions out of sync");
-  SetQuicReloadableFlag(quic_enable_version_48_2, true);
   SetQuicReloadableFlag(quic_enable_version_49, true);
   SetQuicReloadableFlag(quic_enable_version_50, true);
   SetQuicReloadableFlag(quic_enable_version_99, true);
@@ -305,7 +304,6 @@
   QuicTransportVersionVector all_versions = AllSupportedTransportVersions();
   static_assert(QUIC_ARRAYSIZE(kSupportedTransportVersions) == 6u,
                 "Supported versions out of sync");
-  SetQuicReloadableFlag(quic_enable_version_48_2, true);
   SetQuicReloadableFlag(quic_enable_version_49, true);
   SetQuicReloadableFlag(quic_enable_version_50, true);
   SetQuicReloadableFlag(quic_enable_version_99, false);
@@ -328,7 +326,6 @@
 
 TEST_F(QuicVersionsTest, FilterSupportedTransportVersionsNo50) {
   QuicTransportVersionVector all_versions = AllSupportedTransportVersions();
-  SetQuicReloadableFlag(quic_enable_version_48_2, true);
   SetQuicReloadableFlag(quic_enable_version_49, true);
   SetQuicReloadableFlag(quic_enable_version_50, false);
   SetQuicReloadableFlag(quic_enable_version_99, false);
@@ -352,7 +349,6 @@
   QuicTransportVersionVector all_versions = AllSupportedTransportVersions();
   static_assert(QUIC_ARRAYSIZE(kSupportedTransportVersions) == 6u,
                 "Supported versions out of sync");
-  SetQuicReloadableFlag(quic_enable_version_48_2, true);
   SetQuicReloadableFlag(quic_enable_version_49, false);
   SetQuicReloadableFlag(quic_enable_version_50, false);
   SetQuicReloadableFlag(quic_enable_version_99, false);
@@ -372,35 +368,10 @@
   ASSERT_EQ(expected_parsed_versions, FilterSupportedVersions(parsed_versions));
 }
 
-TEST_F(QuicVersionsTest, FilterSupportedTransportVersionsNo48) {
-  QuicTransportVersionVector all_versions = AllSupportedTransportVersions();
-  static_assert(QUIC_ARRAYSIZE(kSupportedTransportVersions) == 6u,
-                "Supported versions out of sync");
-  SetQuicReloadableFlag(quic_enable_version_48_2, false);
-  SetQuicReloadableFlag(quic_enable_version_49, false);
-  SetQuicReloadableFlag(quic_enable_version_50, false);
-  SetQuicReloadableFlag(quic_enable_version_99, false);
-  ParsedQuicVersionVector parsed_versions;
-  for (QuicTransportVersion version : all_versions) {
-    parsed_versions.push_back(ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, version));
-  }
-  QuicTransportVersionVector expected_versions = {QUIC_VERSION_46,
-                                                  QUIC_VERSION_43};
-  ParsedQuicVersionVector expected_parsed_versions;
-  for (QuicTransportVersion version : expected_versions) {
-    expected_parsed_versions.push_back(
-        ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, version));
-  }
-
-  ASSERT_EQ(expected_versions, FilterSupportedTransportVersions(all_versions));
-  ASSERT_EQ(expected_parsed_versions, FilterSupportedVersions(parsed_versions));
-}
-
 TEST_F(QuicVersionsTest, FilterSupportedTransportVersionsNoFlags) {
   QuicTransportVersionVector all_versions = AllSupportedTransportVersions();
   static_assert(QUIC_ARRAYSIZE(kSupportedTransportVersions) == 6u,
                 "Supported versions out of sync");
-  SetQuicReloadableFlag(quic_enable_version_48_2, false);
   SetQuicReloadableFlag(quic_enable_version_49, false);
   SetQuicReloadableFlag(quic_enable_version_50, false);
   SetQuicReloadableFlag(quic_enable_version_99, false);
@@ -408,8 +379,8 @@
   for (QuicTransportVersion version : all_versions) {
     parsed_versions.push_back(ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, version));
   }
-  QuicTransportVersionVector expected_versions = {QUIC_VERSION_46,
-                                                  QUIC_VERSION_43};
+  QuicTransportVersionVector expected_versions = {
+      QUIC_VERSION_48, QUIC_VERSION_46, QUIC_VERSION_43};
   ParsedQuicVersionVector expected_parsed_versions;
   for (QuicTransportVersion version : expected_versions) {
     expected_parsed_versions.push_back(
@@ -515,34 +486,14 @@
   ParsedQuicVersion parsed_version_t099 =
       ParsedQuicVersion(PROTOCOL_TLS1_3, QUIC_VERSION_99);
   SetQuicReloadableFlag(quic_supports_tls_handshake, false);
-  SetQuicReloadableFlag(quic_enable_version_48_2, false);
   SetQuicReloadableFlag(quic_enable_version_49, false);
   SetQuicReloadableFlag(quic_enable_version_50, false);
   SetQuicReloadableFlag(quic_enable_version_99, false);
 
   {
     QuicFlagSaver flag_saver;
-    QuicEnableVersion(parsed_version_q048);
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_supports_tls_handshake));
-    EXPECT_TRUE(GetQuicReloadableFlag(quic_enable_version_48_2));
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_50));
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_99));
-  }
-
-  {
-    QuicFlagSaver flag_saver;
-    QuicEnableVersion(parsed_version_t048);
-    EXPECT_TRUE(GetQuicReloadableFlag(quic_supports_tls_handshake));
-    EXPECT_TRUE(GetQuicReloadableFlag(quic_enable_version_48_2));
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_50));
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_99));
-  }
-
-  {
-    QuicFlagSaver flag_saver;
     QuicEnableVersion(parsed_version_q050);
     EXPECT_FALSE(GetQuicReloadableFlag(quic_supports_tls_handshake));
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_48_2));
     EXPECT_TRUE(GetQuicReloadableFlag(quic_enable_version_50));
     EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_99));
   }
@@ -551,7 +502,6 @@
     QuicFlagSaver flag_saver;
     QuicEnableVersion(parsed_version_t050);
     EXPECT_TRUE(GetQuicReloadableFlag(quic_supports_tls_handshake));
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_48_2));
     EXPECT_TRUE(GetQuicReloadableFlag(quic_enable_version_50));
     EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_99));
   }
@@ -560,7 +510,6 @@
     QuicFlagSaver flag_saver;
     QuicEnableVersion(parsed_version_q049);
     EXPECT_FALSE(GetQuicReloadableFlag(quic_supports_tls_handshake));
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_48_2));
     EXPECT_TRUE(GetQuicReloadableFlag(quic_enable_version_49));
     EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_99));
   }
@@ -569,7 +518,6 @@
     QuicFlagSaver flag_saver;
     QuicEnableVersion(parsed_version_t049);
     EXPECT_TRUE(GetQuicReloadableFlag(quic_supports_tls_handshake));
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_48_2));
     EXPECT_TRUE(GetQuicReloadableFlag(quic_enable_version_49));
     EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_99));
   }
@@ -578,7 +526,6 @@
     QuicFlagSaver flag_saver;
     QuicEnableVersion(parsed_version_t099);
     EXPECT_TRUE(GetQuicReloadableFlag(quic_supports_tls_handshake));
-    EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_48_2));
     EXPECT_FALSE(GetQuicReloadableFlag(quic_enable_version_50));
     EXPECT_TRUE(GetQuicReloadableFlag(quic_enable_version_99));
   }