diff --git a/cmd/ethrex/bench/build_block_benchmark.rs b/cmd/ethrex/bench/build_block_benchmark.rs
index 7600983047..52470d4558 100644
--- a/cmd/ethrex/bench/build_block_benchmark.rs
+++ b/cmd/ethrex/bench/build_block_benchmark.rs
@@ -11,7 +11,7 @@ use criterion::{
     measurement::{Measurement, ValueFormatter},
 };
 use ethrex_blockchain::{
-    Blockchain, BlockchainType,
+    Blockchain, BlockchainOptions, BlockchainType,
     payload::{BuildPayloadArgs, PayloadBuildResult, create_payload},
 };
 use ethrex_common::{
@@ -236,8 +236,11 @@ pub fn build_block_benchmark(c: &mut Criterion<GasMeasurement>) {
                     let (store_with_genesis, genesis) = setup_genesis(&addresses).await;
                     let block_chain = Blockchain::new(
                         store_with_genesis.clone(),
-                        BlockchainType::L1, // TODO: Should we support L2?
-                        false,
+                        BlockchainOptions {
+                            r#type: BlockchainType::L1, // TODO: Should we support L2?
+                            perf_logs_enabled: false,
+                            ..Default::default()
+                        },
                     );
                     fill_mempool(&block_chain, accounts).await;
 
diff --git a/cmd/ethrex/bench/import_blocks_benchmark.rs b/cmd/ethrex/bench/import_blocks_benchmark.rs
index 81c7f4e2a2..22451ae5f9 100644
--- a/cmd/ethrex/bench/import_blocks_benchmark.rs
+++ b/cmd/ethrex/bench/import_blocks_benchmark.rs
@@ -3,7 +3,7 @@ use ethrex::{
     cli::{import_blocks, remove_db},
     utils::{default_datadir, init_datadir},
 };
-use ethrex_blockchain::BlockchainType;
+use ethrex_blockchain::{BlockchainOptions, BlockchainType};
 use ethrex_config::networks::Network;
 
 #[inline]
@@ -23,7 +23,10 @@ fn block_import() {
         "../../fixtures/blockchain/l2-1k-erc20.rlp",
         &datadir,
         genesis,
-        blockchain_type,
+        BlockchainOptions {
+            r#type: blockchain_type,
+            ..Default::default()
+        },
     ))
     .expect("Failed to import blocks on the Tokio runtime");
 }
diff --git a/cmd/ethrex/cli.rs b/cmd/ethrex/cli.rs
index 302cd776bd..c2c3f82fae 100644
--- a/cmd/ethrex/cli.rs
+++ b/cmd/ethrex/cli.rs
@@ -6,7 +6,7 @@ use std::{
 };
 
 use clap::{ArgAction, Parser as ClapParser, Subcommand as ClapSubcommand};
-use ethrex_blockchain::{BlockchainType, error::ChainError};
+use ethrex_blockchain::{BlockchainOptions, BlockchainType, error::ChainError};
 use ethrex_common::types::{Block, Genesis};
 use ethrex_p2p::sync::SyncMode;
 use ethrex_p2p::types::Node;
@@ -107,6 +107,14 @@ pub struct Options {
         long_help = "Possible values: info, debug, trace, warn, error",
         help_heading = "Node options")]
     pub log_level: Level,
+    #[arg(
+        help = "Maximum size of the mempool in number of transactions",
+        long = "mempool.maxsize",
+        default_value_t = 10_000,
+        value_name = "MEMPOOL_MAX_SIZE",
+        help_heading = "Node options"
+    )]
+    pub mempool_max_size: usize,
     #[arg(
         long = "http.addr",
         default_value = "0.0.0.0",
@@ -237,6 +245,7 @@ impl Default for Options {
             metrics_enabled: Default::default(),
             dev: Default::default(),
             force: false,
+            mempool_max_size: Default::default(),
             extra_data: get_minimal_client_version(),
         }
     }
@@ -331,7 +340,17 @@ impl Subcommand {
                 } else {
                     BlockchainType::L1
                 };
-                import_blocks(&path, &opts.datadir, genesis, blockchain_type).await?;
+                import_blocks(
+                    &path,
+                    &opts.datadir,
+                    genesis,
+                    BlockchainOptions {
+                        max_mempool_size: opts.mempool_max_size,
+                        r#type: blockchain_type,
+                        ..Default::default()
+                    },
+                )
+                .await?;
             }
             Subcommand::Export { path, first, last } => {
                 export_blocks(&path, &opts.datadir, first, last).await
@@ -378,12 +397,12 @@ pub async fn import_blocks(
     path: &str,
     datadir: &Path,
     genesis: Genesis,
-    blockchain_type: BlockchainType,
+    blockchain_opts: BlockchainOptions,
 ) -> Result<(), ChainError> {
     let start_time = Instant::now();
     init_datadir(datadir);
     let store = init_store(datadir, genesis).await;
-    let blockchain = init_blockchain(store.clone(), blockchain_type, false);
+    let blockchain = init_blockchain(store.clone(), blockchain_opts);
     let path_metadata = metadata(path).expect("Failed to read path");
 
     // If it's an .rlp file it will be just one chain, but if it's a directory there can be multiple chains.
diff --git a/cmd/ethrex/initializers.rs b/cmd/ethrex/initializers.rs
index 51475fc058..e0d330ff70 100644
--- a/cmd/ethrex/initializers.rs
+++ b/cmd/ethrex/initializers.rs
@@ -5,7 +5,7 @@ use crate::{
         read_jwtsecret_file, read_node_config_file,
     },
 };
-use ethrex_blockchain::{Blockchain, BlockchainType};
+use ethrex_blockchain::{Blockchain, BlockchainOptions, BlockchainType};
 use ethrex_common::types::Genesis;
 use ethrex_config::networks::Network;
 
@@ -114,16 +114,12 @@ pub fn open_store(datadir: &Path) -> Store {
     }
 }
 
-pub fn init_blockchain(
-    store: Store,
-    blockchain_type: BlockchainType,
-    perf_logs_enabled: bool,
-) -> Arc<Blockchain> {
+pub fn init_blockchain(store: Store, blockchain_opts: BlockchainOptions) -> Arc<Blockchain> {
     #[cfg(feature = "revm")]
     info!("Initiating blockchain with revm");
     #[cfg(not(feature = "revm"))]
     info!("Initiating blockchain with levm");
-    Blockchain::new(store, blockchain_type, perf_logs_enabled).into()
+    Blockchain::new(store, blockchain_opts).into()
 }
 
 #[allow(clippy::too_many_arguments)]
@@ -390,7 +386,14 @@ pub async fn init_l1(
     #[cfg(feature = "sync-test")]
     set_sync_block(&store).await;
 
-    let blockchain = init_blockchain(store.clone(), BlockchainType::L1, true);
+    let blockchain = init_blockchain(
+        store.clone(),
+        BlockchainOptions {
+            max_mempool_size: opts.mempool_max_size,
+            perf_logs_enabled: true,
+            r#type: BlockchainType::L1,
+        },
+    );
 
     let signer = get_signer(datadir);
 
diff --git a/cmd/ethrex/l2/initializers.rs b/cmd/ethrex/l2/initializers.rs
index 3fb7b489c8..8d256352bd 100644
--- a/cmd/ethrex/l2/initializers.rs
+++ b/cmd/ethrex/l2/initializers.rs
@@ -170,7 +170,13 @@ pub async fn init_l2(
     let store = init_store(&datadir, genesis).await;
     let rollup_store = init_rollup_store(&rollup_store_dir).await;
 
-    let blockchain = init_blockchain(store.clone(), BlockchainType::L2, true);
+    let blockchain_opts = ethrex_blockchain::BlockchainOptions {
+        max_mempool_size: opts.node_opts.mempool_max_size,
+        r#type: BlockchainType::L2,
+        perf_logs_enabled: true,
+    };
+
+    let blockchain = init_blockchain(store.clone(), blockchain_opts);
 
     let signer = get_signer(&datadir);
 
diff --git a/cmd/ethrex_replay/src/cli.rs b/cmd/ethrex_replay/src/cli.rs
index b34582444c..8cf4ec743a 100644
--- a/cmd/ethrex_replay/src/cli.rs
+++ b/cmd/ethrex_replay/src/cli.rs
@@ -8,7 +8,7 @@ use std::{
 
 use clap::{ArgGroup, Parser, Subcommand, ValueEnum};
 use ethrex_blockchain::{
-    Blockchain, BlockchainType,
+    Blockchain,
     fork_choice::apply_fork_choice,
     payload::{BuildPayloadArgs, PayloadBuildResult, create_payload},
 };
@@ -896,7 +896,10 @@ pub async fn replay_custom_l1_blocks(
         store_inner
     };
 
-    let blockchain = Arc::new(Blockchain::new(store.clone(), BlockchainType::L1, false));
+    let blockchain = Arc::new(Blockchain::new(
+        store.clone(),
+        ethrex_blockchain::BlockchainOptions::default(),
+    ));
 
     let blocks = produce_l1_blocks(
         blockchain.clone(),
diff --git a/crates/blockchain/blockchain.rs b/crates/blockchain/blockchain.rs
index 02101bae70..5782369849 100644
--- a/crates/blockchain/blockchain.rs
+++ b/crates/blockchain/blockchain.rs
@@ -48,6 +48,7 @@ use ethrex_metrics::metrics_blocks::METRICS_BLOCKS;
 use ethrex_common::types::BlobsBundle;
 
 const MAX_PAYLOADS: usize = 10;
+const MAX_MEMPOOL_SIZE_DEFAULT: usize = 10_000;
 
 //TODO: Implement a struct Chain or BlockChain to encapsulate
 //functionality and canonical chain state and config
@@ -67,14 +68,30 @@ pub struct Blockchain {
     /// This will be set to true once the initial sync has taken place and wont be set to false after
     /// This does not reflect whether there is an ongoing sync process
     is_synced: AtomicBool,
-    /// Whether performance logs should be emitted
-    pub perf_logs_enabled: bool,
-    pub r#type: BlockchainType,
+    pub options: BlockchainOptions,
     /// Mapping from a payload id to either a complete payload or a payload build task
     /// We need to keep completed payloads around in case consensus requests them twice
     pub payloads: Arc<TokioMutex<Vec<(u64, PayloadOrTask)>>>,
 }
 
+#[derive(Debug, Clone)]
+pub struct BlockchainOptions {
+    pub max_mempool_size: usize,
+    /// Whether performance logs should be emitted
+    pub perf_logs_enabled: bool,
+    pub r#type: BlockchainType,
+}
+
+impl Default for BlockchainOptions {
+    fn default() -> Self {
+        Self {
+            max_mempool_size: MAX_MEMPOOL_SIZE_DEFAULT,
+            perf_logs_enabled: false,
+            r#type: BlockchainType::default(),
+        }
+    }
+}
+
 #[derive(Debug, Clone)]
 pub struct BatchBlockProcessingFailure {
     pub last_valid_hash: H256,
@@ -94,25 +111,23 @@ fn log_batch_progress(batch_size: u32, current_block: u32) {
 }
 
 impl Blockchain {
-    pub fn new(store: Store, blockchain_type: BlockchainType, perf_logs_enabled: bool) -> Self {
+    pub fn new(store: Store, blockchain_opts: BlockchainOptions) -> Self {
         Self {
             storage: store,
-            mempool: Mempool::new(),
+            mempool: Mempool::new(blockchain_opts.max_mempool_size),
             is_synced: AtomicBool::new(false),
-            r#type: blockchain_type,
             payloads: Arc::new(TokioMutex::new(Vec::new())),
-            perf_logs_enabled,
+            options: blockchain_opts,
         }
     }
 
     pub fn default_with_store(store: Store) -> Self {
         Self {
             storage: store,
-            mempool: Mempool::new(),
+            mempool: Mempool::new(MAX_MEMPOOL_SIZE_DEFAULT),
             is_synced: AtomicBool::new(false),
-            r#type: BlockchainType::default(),
             payloads: Arc::new(TokioMutex::new(Vec::new())),
-            perf_logs_enabled: false,
+            options: BlockchainOptions::default(),
         }
     }
 
@@ -204,7 +219,7 @@ impl Blockchain {
             let vm_db: DynVmDatabase =
                 Box::new(StoreVmDatabase::new(self.storage.clone(), parent_hash));
             let logger = Arc::new(DatabaseLogger::new(Arc::new(Mutex::new(Box::new(vm_db)))));
-            let mut vm = match self.r#type {
+            let mut vm = match self.options.r#type {
                 BlockchainType::L1 => Evm::new_from_db_for_l1(logger.clone()),
                 BlockchainType::L2 => Evm::new_from_db_for_l2(logger.clone()),
             };
@@ -422,7 +437,7 @@ impl Blockchain {
         let result = self.store_block(block, account_updates_list, res).await;
         let stored = Instant::now();
 
-        if self.perf_logs_enabled {
+        if self.options.perf_logs_enabled {
             Self::print_add_block_logs(block, since, executed, merkleized, stored);
         }
         result
@@ -613,7 +628,7 @@ impl Blockchain {
             METRICS_BLOCKS.set_latest_gigagas(throughput);
         );
 
-        if self.perf_logs_enabled {
+        if self.options.perf_logs_enabled {
             info!(
                 "[METRICS] Executed and stored: Range: {}, Last block num: {}, Last block gas limit: {}, Total transactions: {}, Total Gas: {}, Throughput: {} Gigagas/s",
                 blocks_len,
@@ -883,7 +898,7 @@ impl Blockchain {
     }
 
     pub fn new_evm(&self, vm_db: StoreVmDatabase) -> Result<Evm, EvmError> {
-        let evm = match self.r#type {
+        let evm = match self.options.r#type {
             BlockchainType::L1 => Evm::new_for_l1(vm_db),
             BlockchainType::L2 => Evm::new_for_l2(vm_db)?,
         };
diff --git a/crates/blockchain/mempool.rs b/crates/blockchain/mempool.rs
index 8bf9733725..285e83bed3 100644
--- a/crates/blockchain/mempool.rs
+++ b/crates/blockchain/mempool.rs
@@ -19,12 +19,6 @@ use ethrex_storage::error::StoreError;
 use std::collections::HashSet;
 use tracing::warn;
 
-// Max number of transactions in the mempool
-const MEMPOOL_MAX_SIZE: usize = 10000; //TODO: Define
-
-// Max number of transactions to let the mempool order queue grow before pruning it
-const MEMPOOL_PRUNE_THRESHOLD: usize = MEMPOOL_MAX_SIZE + MEMPOOL_MAX_SIZE / 2;
-
 #[derive(Debug, Default)]
 struct MempoolInner {
     broadcast_pool: HashSet<H256>,
@@ -32,12 +26,18 @@ struct MempoolInner {
     blobs_bundle_pool: HashMap<H256, BlobsBundle>,
     txs_by_sender_nonce: BTreeMap<(H160, u64), H256>,
     txs_order: VecDeque<H256>,
+    max_mempool_size: usize,
+    // Max number of transactions to let the mempool order queue grow before pruning it
+    mempool_prune_threshold: usize,
 }
 
 impl MempoolInner {
-    fn new() -> Self {
+    fn new(max_mempool_size: usize) -> Self {
         MempoolInner {
-            txs_order: VecDeque::with_capacity(MEMPOOL_MAX_SIZE * 2),
+            txs_order: VecDeque::with_capacity(max_mempool_size * 2),
+            transaction_pool: HashMap::with_capacity(max_mempool_size),
+            max_mempool_size,
+            mempool_prune_threshold: max_mempool_size + max_mempool_size / 2,
             ..Default::default()
         }
     }
@@ -60,7 +60,7 @@ impl MempoolInner {
     /// Remove the oldest transaction in the pool
     fn remove_oldest_transaction(&mut self) -> Result<(), StoreError> {
         // Remove elements from the order queue until one is present in the pool
-        while self.transaction_pool.len() >= MEMPOOL_MAX_SIZE {
+        while self.transaction_pool.len() >= self.max_mempool_size {
             if let Some(oldest_hash) = self.txs_order.pop_front() {
                 self.remove_transaction_with_lock(&oldest_hash)?;
             } else {
@@ -81,9 +81,9 @@ pub struct Mempool {
 }
 
 impl Mempool {
-    pub fn new() -> Self {
+    pub fn new(max_mempool_size: usize) -> Self {
         Mempool {
-            inner: RwLock::new(MempoolInner::new()),
+            inner: RwLock::new(MempoolInner::new(max_mempool_size)),
         }
     }
 
@@ -107,13 +107,13 @@ impl Mempool {
     ) -> Result<(), StoreError> {
         let mut inner = self.write()?;
         // Prune the order queue if it has grown too much
-        if inner.txs_order.len() > MEMPOOL_PRUNE_THRESHOLD {
+        if inner.txs_order.len() > inner.mempool_prune_threshold {
             // NOTE: we do this to avoid borrow checker errors
             let txpool = core::mem::take(&mut inner.transaction_pool);
             inner.txs_order.retain(|tx| txpool.contains_key(tx));
             inner.transaction_pool = txpool;
         }
-        if inner.transaction_pool.len() >= MEMPOOL_MAX_SIZE {
+        if inner.transaction_pool.len() >= inner.max_mempool_size {
             inner.remove_oldest_transaction()?;
         }
         inner.txs_order.push_back(hash);
@@ -491,6 +491,8 @@ mod tests {
     use ethrex_storage::EngineType;
     use ethrex_storage::{Store, error::StoreError};
 
+    const MEMPOOL_MAX_SIZE_TEST: usize = 10_000;
+
     async fn setup_storage(config: ChainConfig, header: BlockHeader) -> Result<Store, StoreError> {
         let store = Store::new("test", EngineType::InMemory)?;
         let block_number = header.number;
@@ -846,7 +848,7 @@ mod tests {
         let blob_tx = MempoolTransaction::new(blob_tx_decoded, blob_tx_sender);
         let plain_tx_hash = plain_tx.hash();
         let blob_tx_hash = blob_tx.hash();
-        let mempool = Mempool::new();
+        let mempool = Mempool::new(MEMPOOL_MAX_SIZE_TEST);
         let filter =
             |tx: &Transaction| -> bool { matches!(tx, Transaction::EIP4844Transaction(_)) };
         mempool
@@ -861,7 +863,7 @@ mod tests {
     fn blobs_bundle_loadtest() {
         // Write a bundle of 6 blobs 10 times
         // If this test fails please adjust the max_size in the DB config
-        let mempool = Mempool::new();
+        let mempool = Mempool::new(MEMPOOL_MAX_SIZE_TEST);
         for i in 0..300 {
             let blobs = [[i as u8; BYTES_PER_BLOB]; 6];
             let commitments = [[i as u8; 48]; 6];
diff --git a/crates/blockchain/payload.rs b/crates/blockchain/payload.rs
index a2e3975382..da186ec699 100644
--- a/crates/blockchain/payload.rs
+++ b/crates/blockchain/payload.rs
@@ -389,9 +389,10 @@ impl Blockchain {
 
         debug!("Building payload");
         let base_fee = payload.header.base_fee_per_gas.unwrap_or_default();
-        let mut context = PayloadBuildContext::new(payload, &self.storage, self.r#type.clone())?;
+        let mut context =
+            PayloadBuildContext::new(payload, &self.storage, self.options.r#type.clone())?;
 
-        if let BlockchainType::L1 = self.r#type {
+        if let BlockchainType::L1 = self.options.r#type {
             self.apply_system_operations(&mut context)?;
         }
         self.apply_withdrawals(&mut context)?;
diff --git a/crates/l2/sequencer/block_producer/payload_builder.rs b/crates/l2/sequencer/block_producer/payload_builder.rs
index 984fcbfc09..8d1340b937 100644
--- a/crates/l2/sequencer/block_producer/payload_builder.rs
+++ b/crates/l2/sequencer/block_producer/payload_builder.rs
@@ -45,7 +45,7 @@ pub async fn build_payload(
     let gas_limit = payload.header.gas_limit;
 
     debug!("Building payload");
-    let mut context = PayloadBuildContext::new(payload, store, blockchain.r#type.clone())?;
+    let mut context = PayloadBuildContext::new(payload, store, blockchain.options.r#type.clone())?;
 
     fill_transactions(
         blockchain.clone(),
diff --git a/docs/CLI.md b/docs/CLI.md
index 082e051c5a..d9d5788cec 100644
--- a/docs/CLI.md
+++ b/docs/CLI.md
@@ -57,6 +57,11 @@ Node options:
 
           [default: INFO]
 
+      --mempool.maxsize <MEMPOOL_MAX_SIZE>
+          Maximum size of the mempool in number of transactions
+        
+          [default: 10000]
+
 P2P options:
       --bootnodes <BOOTNODE_LIST>...
           Comma separated enode URLs for P2P discovery bootstrap.
diff --git a/tooling/ef_tests/blockchain/test_runner.rs b/tooling/ef_tests/blockchain/test_runner.rs
index 1fbc2753e2..301b01d423 100644
--- a/tooling/ef_tests/blockchain/test_runner.rs
+++ b/tooling/ef_tests/blockchain/test_runner.rs
@@ -6,7 +6,7 @@ use crate::{
     types::{BlockChainExpectedException, BlockExpectedException, BlockWithRLP, TestUnit},
 };
 use ethrex_blockchain::{
-    Blockchain, BlockchainType,
+    Blockchain, BlockchainOptions,
     error::{ChainError, InvalidBlockError},
     fork_choice::apply_fork_choice,
 };
@@ -105,7 +105,7 @@ pub async fn run_ef_test(
     check_prestate_against_db(test_key, test, &store);
 
     // Blockchain EF tests are meant for L1.
-    let blockchain = Blockchain::new(store.clone(), BlockchainType::L1, false);
+    let blockchain = Blockchain::new(store.clone(), BlockchainOptions::default());
 
     // Early return if the exception is in the rlp decoding of the block
     for bf in &test.blocks {
diff --git a/tooling/ef_tests/state_v2/src/modules/block_runner.rs b/tooling/ef_tests/state_v2/src/modules/block_runner.rs
index dc63679a52..ed579f332f 100644
--- a/tooling/ef_tests/state_v2/src/modules/block_runner.rs
+++ b/tooling/ef_tests/state_v2/src/modules/block_runner.rs
@@ -1,6 +1,6 @@
 use bytes::Bytes;
+use ethrex_blockchain::Blockchain;
 use ethrex_blockchain::get_total_blob_gas;
-use ethrex_blockchain::{Blockchain, BlockchainType};
 use ethrex_common::constants::DEFAULT_REQUESTS_HASH;
 use ethrex_common::types::{
     Block, BlockBody, BlockHeader, Fork, Receipt, Transaction, compute_receipts_root,
@@ -144,7 +144,10 @@ pub async fn run_test(test: &Test, test_case: &TestCase) -> Result<(), RunnerErr
 
     // 3. Create Blockchain and add block.
 
-    let blockchain = Blockchain::new(store.clone(), BlockchainType::L1, false);
+    let blockchain = Blockchain::new(
+        store.clone(),
+        ethrex_blockchain::BlockchainOptions::default(),
+    );
 
     let result = blockchain.add_block(&block).await;