diff --git a/beacon_node/beacon_chain/src/inclusion_list_verification.rs b/beacon_node/beacon_chain/src/inclusion_list_verification.rs
index b4fc82e735..f687bc2e4e 100644
--- a/beacon_node/beacon_chain/src/inclusion_list_verification.rs
+++ b/beacon_node/beacon_chain/src/inclusion_list_verification.rs
@@ -49,14 +49,13 @@ impl<T: BeaconChainTypes> GossipVerifiedInclusionList<T> {
             .now()
             .ok_or(BeaconChainError::UnableToReadSlot)?;
 
-        // TODO(focil) move 8192 to config
         if signed_il
             .message
             .transactions
             .iter()
             .map(|v| v.len())
             .sum::<usize>()
-            > 8192
+            > chain.spec.max_bytes_per_inclusion_list as usize
         {
             return Err(GossipInclusionListError::TooManyTransactions);
         }
@@ -124,10 +123,9 @@ impl<T: BeaconChainTypes> GossipVerifiedInclusionList<T> {
             return Err(GossipInclusionListError::PriorInclusionListKnown);
         }
 
-        // Compute timeliness: timely if received before INCLUSION_LIST_DUE_BPS into the slot
-        // INCLUSION_LIST_DUE_BPS = 6667 basis points = 66.67% of slot duration
         let slot_duration_ms = chain.spec.get_slot_duration().as_millis() as u64;
-        let inclusion_list_due_ms = slot_duration_ms * 6667 / 10000;
+        let inclusion_list_due_ms =
+            slot_duration_ms * chain.spec.inclusion_list_due_bps / 10000;
         let il_delay_ms =
             get_slot_delay_ms(timestamp_now(), message_slot, &chain.slot_clock).as_millis() as u64;
         let is_timely = il_delay_ms <= inclusion_list_due_ms;
diff --git a/consensus/types/src/core/chain_spec.rs b/consensus/types/src/core/chain_spec.rs
index e6cf1a01e3..1d2a2d9d62 100644
--- a/consensus/types/src/core/chain_spec.rs
+++ b/consensus/types/src/core/chain_spec.rs
@@ -235,6 +235,9 @@ pub struct ChainSpec {
      */
     pub domain_inclusion_list_committee: u32,
     pub inclusion_list_committee_size: u64,
+    pub max_bytes_per_inclusion_list: u64,
+    pub max_request_inclusion_list: u64,
+    pub inclusion_list_due_bps: u64,
 
     /*
      * Fulu hard fork params
@@ -1292,6 +1295,9 @@ impl ChainSpec {
              */
             domain_inclusion_list_committee: 12,
             inclusion_list_committee_size: 16,
+            max_bytes_per_inclusion_list: 8192,
+            max_request_inclusion_list: 16,
+            inclusion_list_due_bps: 6667,
 
             /*
              * Fulu hard fork params
@@ -1730,6 +1736,9 @@ impl ChainSpec {
              */
             domain_inclusion_list_committee: 12,
             inclusion_list_committee_size: 16,
+            max_bytes_per_inclusion_list: 8192,
+            max_request_inclusion_list: 16,
+            inclusion_list_due_bps: 6667,
 
             /*
              * Fulu hard fork params
diff --git a/validator_client/validator_services/src/inclusion_list_service.rs b/validator_client/validator_services/src/inclusion_list_service.rs
index c447a120d3..b57a2d4090 100644
--- a/validator_client/validator_services/src/inclusion_list_service.rs
+++ b/validator_client/validator_services/src/inclusion_list_service.rs
@@ -274,7 +274,7 @@ impl<S: ValidatorStore + 'static, T: SlotClock + 'static> InclusionListService<S
 
         for transaction in inclusion_list_transactions.into_iter() {
             total_bytes += transaction.len();
-            if total_bytes <= 8192 {
+            if total_bytes <= self.chain_spec.max_bytes_per_inclusion_list as usize {
                 trimmed_il.push(transaction);
             }
         }