diff --git a/beacon_chain/gossip_processing/gossip_validation.nim b/beacon_chain/gossip_processing/gossip_validation.nim
index aa606509c5..903a0a0ffc 100644
--- a/beacon_chain/gossip_processing/gossip_validation.nim
+++ b/beacon_chain/gossip_processing/gossip_validation.nim
@@ -295,6 +295,9 @@ template checkedReject(
 
 func getMaxBlobsPerBlock(cfg: RuntimeConfig, wallTime: BeaconTime): uint64 =
   if min(wallTime, wallTime - MAXIMUM_GOSSIP_CLOCK_DISPARITY).slotOrZero.epoch >=
+      cfg.FULU_FORK_EPOCH:
+    cfg.MAX_BLOBS_PER_BLOCK_FULU
+  elif min(wallTime, wallTime - MAXIMUM_GOSSIP_CLOCK_DISPARITY).slotOrZero.epoch >=
       cfg.ELECTRA_FORK_EPOCH:
     cfg.MAX_BLOBS_PER_BLOCK_ELECTRA
   else:
diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index d7172f8588..9a14d569f9 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -1573,7 +1573,7 @@ proc getLowSubnets(node: Eth2Node, epoch: Epoch):
     else:
       default(SyncnetBits),
     if epoch >= node.cfg.FULU_FORK_EPOCH:
-      findLowSubnets(getDataColumnSidecarTopic, uint64, (DATA_COLUMN_SIDECAR_SUBNET_COUNT).int)
+      findLowSubnets(getDataColumnSidecarTopic, uint64, (fulu.DATA_COLUMN_SIDECAR_SUBNET_COUNT).int)
     else:
       default(CgcBits)
   )
diff --git a/beacon_chain/spec/datatypes/constants.nim b/beacon_chain/spec/datatypes/constants.nim
index 4db4ae9d06..d3213c32a0 100644
--- a/beacon_chain/spec/datatypes/constants.nim
+++ b/beacon_chain/spec/datatypes/constants.nim
@@ -67,6 +67,9 @@ const
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/deneb/p2p-interface.md#configuration
   BLOB_SIDECAR_SUBNET_COUNT*: uint64 = 6
 
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.10/specs/fulu/p2p-interface.md#configuration
+  DATA_COLUMN_SIDECAR_SUBNET_COUNT*: uint64 = 128
+
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#configuration
   MAX_REQUEST_BLOCKS* = 1024'u64
   RESP_TIMEOUT* = 10'u64
@@ -90,6 +93,13 @@ const
   # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.10/specs/electra/beacon-chain.md#execution-1
   MAX_BLOBS_PER_BLOCK_ELECTRA* = 9'u64
 
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.10/specs/fulu/beacon-chain.md#execution
+  MAX_BLOBS_PER_BLOCK_FULU* = 12'u64
+
   # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.10/specs/electra/p2p-interface.md#configuration
   MAX_REQUEST_BLOB_SIDECARS_ELECTRA* =
     MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA
+
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.10/specs/fulu/p2p-interface.md#configuration
+  MAX_REQUEST_BLOB_SIDECARS_FULU* =
+    MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_FULU
diff --git a/beacon_chain/spec/presets.nim b/beacon_chain/spec/presets.nim
index 76b1a9e00b..292b4fdd42 100644
--- a/beacon_chain/spec/presets.nim
+++ b/beacon_chain/spec/presets.nim
@@ -121,6 +121,12 @@ type
     MAX_BLOBS_PER_BLOCK_ELECTRA*: uint64
     MAX_REQUEST_BLOB_SIDECARS_ELECTRA*: uint64
 
+    # Fulu
+    DATA_COLUMN_SIDECAR_SUBNET_COUNT*: uint64
+    MAX_BLOBS_PER_BLOCK_FULU*: uint64
+    MAX_REQUEST_BLOB_SIDECARS_FULU*: uint64
+
+
   PresetFile* = object
     values*: Table[string, string]
     missingValues*: seq[string]
@@ -295,7 +301,15 @@ when const_preset == "mainnet":
     # `uint64(9)`
     MAX_BLOBS_PER_BLOCK_ELECTRA: 9,
     # MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA
-    MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152
+    MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152,
+
+    # Fulu
+    # `128`
+    DATA_COLUMN_SIDECAR_SUBNET_COUNT: 128,
+    # `uint64(12)`
+    MAX_BLOBS_PER_BLOCK_FULU: 12,
+    # MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_FULU
+    MAX_REQUEST_BLOB_SIDECARS_FULU: 1536
   )
 
 elif const_preset == "gnosis":
@@ -455,7 +469,15 @@ elif const_preset == "gnosis":
     # `uint64(9)`
     MAX_BLOBS_PER_BLOCK_ELECTRA: 9,
     # MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA
-    MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152
+    MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152,
+
+    # Fulu
+    # `128`
+    DATA_COLUMN_SIDECAR_SUBNET_COUNT: 128,
+    # `uint64(12)`
+    MAX_BLOBS_PER_BLOCK_FULU: 12,
+    # MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_FULU
+    MAX_REQUEST_BLOB_SIDECARS_FULU: 1536
   )
 
 elif const_preset == "minimal":
@@ -613,6 +635,14 @@ elif const_preset == "minimal":
     MAX_BLOBS_PER_BLOCK_ELECTRA: 9,
     # MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA
     MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152,
+
+    # Fulu
+    # `128`
+    DATA_COLUMN_SIDECAR_SUBNET_COUNT: 128,
+    # `uint64(12)`
+    MAX_BLOBS_PER_BLOCK_FULU: 12,
+    # MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_FULU
+    MAX_REQUEST_BLOB_SIDECARS_FULU: 1536
   )
 
 else:
@@ -826,6 +856,9 @@ proc readRuntimeConfig*(
   checkCompatibility BLOB_SIDECAR_SUBNET_COUNT
   checkCompatibility MAX_BLOBS_PER_BLOCK_ELECTRA
   checkCompatibility MAX_REQUEST_BLOB_SIDECARS_ELECTRA
+  checkCompatibility DATA_COLUMN_SIDECAR_SUBNET_COUNT
+  checkCompatibility MAX_BLOBS_PER_BLOCK_FULU
+  checkCompatibility MAX_REQUEST_BLOB_SIDECARS_FULU
 
   # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.10/specs/phase0/fork-choice.md#configuration
   # Isn't being used as a preset in the usual way: at any time, there's one correct value
diff --git a/beacon_chain/spec/state_transition_block.nim b/beacon_chain/spec/state_transition_block.nim
index 4140cf19c0..f8cda6a614 100644
--- a/beacon_chain/spec/state_transition_block.nim
+++ b/beacon_chain/spec/state_transition_block.nim
@@ -1030,7 +1030,7 @@ proc process_execution_payload*(
   if not (payload.timestamp == compute_timestamp_at_slot(state, state.slot)):
     return err("process_execution_payload: invalid timestamp")
 
-  # [New in Deneb] Verify commitments are under limit
+  # [New in Electra] Verify commitments are under limit
   if not (lenu64(body.blob_kzg_commitments) <= cfg.MAX_BLOBS_PER_BLOCK_ELECTRA):
     return err("process_execution_payload: too many KZG commitments")
 
@@ -1065,7 +1065,7 @@ type SomeFuluBeaconBlockBody =
   fulu.BeaconBlockBody | fulu.SigVerifiedBeaconBlockBody |
   fulu.TrustedBeaconBlockBody
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/electra/beacon-chain.md#modified-process_execution_payload
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.10/specs/fulu/beacon-chain.md#modified-process_execution_payload
 proc process_execution_payload*(
     cfg: RuntimeConfig, state: var fulu.BeaconState,
     body: SomeFuluBeaconBlockBody,
@@ -1086,8 +1086,8 @@ proc process_execution_payload*(
   if not (payload.timestamp == compute_timestamp_at_slot(state, state.slot)):
     return err("process_execution_payload: invalid timestamp")
 
-  # [New in Deneb] Verify commitments are under limit
-  if not (lenu64(body.blob_kzg_commitments) <= cfg.MAX_BLOBS_PER_BLOCK_ELECTRA):
+  # [New in Fulu] Verify commitments are under limit
+  if not (lenu64(body.blob_kzg_commitments) <= cfg.MAX_BLOBS_PER_BLOCK_FULU):
     return err("process_execution_payload: too many KZG commitments")
 
   # Verify the execution payload is valid