diff --git a/py/torch_tensorrt/fx/lower_setting.py b/py/torch_tensorrt/fx/lower_setting.py
index d1e1ba9d9a..b9cbb2630d 100644
--- a/py/torch_tensorrt/fx/lower_setting.py
+++ b/py/torch_tensorrt/fx/lower_setting.py
@@ -10,65 +10,64 @@
 
 
 @dc.dataclass
-class LowerSetting:
+class LowerSettingBasic:
+    """
+    Basic class for lowering.
+    max_batch_size: The maximum batch size for lowering job.
+                    If run with TensorRT lowering, this is the maximum
+                    batch size which can be used at execution time,
+                    and also the batch size for which the ICudaEngine
+                    will be optimized.
+                    If run with AITemplate lowering, this the max batch_size
+                    for the model.
+    lower_precision: lower precision dtype during lowering.
+    min_acc_module_size(int): minimal number of nodes for an accelerate submodule.
+    ast_rewriter_allow_list (Optional[Set[nn.Module]]): Optional allow list of
+    modules that need AST rewriting. This is aiming to eliminate input variable involve in
+    exception checking control flow.
+    leaf_module_list (Optional[Set[nn.Module]]): Optional leaf module list where
+    modules will not be traced into.
+    verbose_profile (bool): verbosity of profiler, default to False.
     """
-    Basic configuration for lowering stack.
 
-    Args:
-    max_batch_size: The maximum batch size which can be used at execution time,
-    and also the batch size for which the ICudaEngine will be optimized.
+    max_batch_size: int = 2048
+    lower_precision: LowerPrecision = LowerPrecision.FP32
+    min_acc_module_size: int = 10
+    ast_rewriter_allow_list: Optional[Set[Type[nn.Module]]] = None
+    leaf_module_list: Optional[Set[Type[nn.Module]]] = None
+    verbose_profile: bool = False
 
+
+@dc.dataclass
+class LowerSetting(LowerSettingBasic):
+    """
+    Basic configuration for lowering stack.
+    Args:
     input_specs: Specs for inputs to engine, can either be a single size or a
     range defined by Min, Optimal, Max sizes.
-
     explicit_batch_dimension: Use explicit batch dimension during lowering.
-
     explicit_precision: Use explicit precision during lowering.
-
-    lower_precision: lower precision dtype during lowering.
-
     max_workspace_size: The maximum workspace size. The maximum GPU temporary
     memory which the TensorRT engine can use at execution time.
-
     strict_type_constraints: Require TensorRT engine to strictly follow data type
     setting at execution time.
-
     customized_fuse_pass: List of custmozied pass to apply during lowering process.
-
     lower_basic_fuse_pass: Enable basic pass fuse duirng lowering, i.e. fuse multiple operations
     as (a->b->c->d)=>(e). Current basic fuse patterns are:
     permute->linear
     permute->matmul
-
     verbose_log: Enable TensorRT engine verbose log mode.
-
     algo_selector: Enable TensorRT algorithm selector at execution time.
-
     timing_cache_prefix: TensorRT timing cache file path. TensorRT engine will use timing
     cache file at execution time if valid timing cache file is provided.
-
     save_timing_cache: Save updated timing cache data into timing cache file if the timing
     cache file is provided.
-
-    ast_rewriter_allow_list (Optional[Set[nn.Module]]): Optional allow list of
-    modules that need AST rewriting. This is aiming to eliminate input variable involve in
-    exception checking control flow.
-
-    leaf_module_list (Optional[Set[nn.Module]]): Optional leaf module list where
-    modules will not be traced into.
-
     cuda_graph_batch_size (int): Cuda graph batch size, default to be -1.
-
-    verbose_profile (bool): verbosity of profiler, default to False.
-
-    min_acc_module_size(int): minimal number of nodes for an accelerate submodule.
     """
 
-    max_batch_size: int = 2048
     input_specs: List[InputTensorSpec] = dc.field(default_factory=list)
     explicit_batch_dimension: bool = True
     explicit_precision: bool = False
-    lower_precision: LowerPrecision = LowerPrecision.FP32
     max_workspace_size: int = 1 << 30
     strict_type_constraints: bool = False
     customized_fuse_pass: PassManager = PassManager.build_from_passlist([])
@@ -79,8 +78,4 @@ class LowerSetting:
     algo_selector = None
     timing_cache_prefix: str = ""
     save_timing_cache: bool = False
-    ast_rewriter_allow_list: Optional[Set[Type[nn.Module]]] = None
-    leaf_module_list: Optional[Set[Type[nn.Module]]] = None
     cuda_graph_batch_size: int = -1
-    verbose_profile: bool = False
-    min_acc_module_size: int = 10