diff --git a/core/chains/evm/config/toml/defaults/L3X_Mainnet.toml b/core/chains/evm/config/toml/defaults/L3X_Mainnet.toml
index f593e39462d..1fbda42fd2a 100644
--- a/core/chains/evm/config/toml/defaults/L3X_Mainnet.toml
+++ b/core/chains/evm/config/toml/defaults/L3X_Mainnet.toml
@@ -14,10 +14,5 @@ LimitMax = 1_000_000_000
 # Arbitrum-based chains uses the suggested gas price, so we don't want to place any limits on the minimum
 PriceMin = '0'
 PriceDefault = '0.1 gwei'
-PriceMax = '115792089237316195423570985008687907853269984665.640564039457584007913129639935 tether'
 FeeCapDefault = '1000 gwei'
 BumpThreshold = 5
-
-[GasEstimator.BlockHistory]
-# Force an error if someone set GAS_UPDATER_ENABLED=true by accident; we never want to run the block history estimator on arbitrum
-BlockHistorySize = 0
diff --git a/core/chains/evm/config/toml/defaults/L3X_Sepolia.toml b/core/chains/evm/config/toml/defaults/L3X_Sepolia.toml
index ee3e9df23ff..ee515bb72ba 100644
--- a/core/chains/evm/config/toml/defaults/L3X_Sepolia.toml
+++ b/core/chains/evm/config/toml/defaults/L3X_Sepolia.toml
@@ -14,10 +14,5 @@ LimitMax = 1_000_000_000
 # Arbitrum-based chains uses the suggested gas price, so we don't want to place any limits on the minimum
 PriceMin = '0'
 PriceDefault = '0.1 gwei'
-PriceMax = '115792089237316195423570985008687907853269984665.640564039457584007913129639935 tether'
 FeeCapDefault = '1000 gwei'
 BumpThreshold = 5
-
-[GasEstimator.BlockHistory]
-# Force an error if someone set GAS_UPDATER_ENABLED=true by accident; we never want to run the block history estimator on arbitrum
-BlockHistorySize = 0
diff --git a/docs/CONFIG.md b/docs/CONFIG.md
index f36467c6d60..acff2531af8 100644
--- a/docs/CONFIG.md
+++ b/docs/CONFIG.md
@@ -5456,7 +5456,7 @@ TipCapMin = '1 wei'
 
 [GasEstimator.BlockHistory]
 BatchSize = 25
-BlockHistorySize = 0
+BlockHistorySize = 8
 CheckInclusionBlocks = 12
 CheckInclusionPercentile = 90
 TransactionPercentile = 60
@@ -5550,7 +5550,7 @@ TipCapMin = '1 wei'
 
 [GasEstimator.BlockHistory]
 BatchSize = 25
-BlockHistorySize = 0
+BlockHistorySize = 8
 CheckInclusionBlocks = 12
 CheckInclusionPercentile = 90
 TransactionPercentile = 60