diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b0ac2d970..f3f5817e07 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 ## [Unreleased]
 
+### Fixed
+
+- AWS IOpS attribute is only valid for io1 and io2 type
+  ([Issue #157](https://github.com/cycloidio/terracognita/issues/157))
+
 ## [0.6.0] _2020-12-22_
 
 ### Added
diff --git a/cmd/aws.go b/cmd/aws.go
index 2780c07968..882162d970 100644
--- a/cmd/aws.go
+++ b/cmd/aws.go
@@ -85,7 +85,40 @@ var (
 			}
 
 			var hclW, stateW writer.Writer
-			options := &writer.Options{Interpolate: viper.GetBool("interpolate")}
+			options := &writer.Options{
+				Interpolate: viper.GetBool("interpolate"),
+				PreSync: func(i interface{}) error {
+					for rt, resource := range i.(map[string]map[string]interface{}) {
+						// we loop over a resource (e.g: aws_instance.oDSOj)
+						for _, block := range resource {
+							// we remove IOPS for GP2 volume types
+							// https://github.com/cycloidio/terracognita/issues/157
+							if rt == "aws_instance" {
+								if bds, ok := block.(map[string]interface{})["root_block_device"]; ok {
+									for _, bd := range bds.([]interface{}) {
+										if vt, ok := bd.(map[string]interface{})["volume_type"].(string); ok && vt == "gp2" {
+											delete(bd.(map[string]interface{}), "iops")
+										}
+									}
+								}
+								if bds, ok := block.(map[string]interface{})["ebs_block_device"]; ok {
+									for _, bd := range bds.([]interface{}) {
+										if vt, ok := bd.(map[string]interface{})["volume_type"].(string); ok && vt == "gp2" {
+											delete(bd.(map[string]interface{}), "iops")
+										}
+									}
+								}
+							}
+							if rt == "aws_ebs_volume" {
+								if t, ok := block.(map[string]interface{})["type"]; ok && t == "gp2" {
+									delete(block.(map[string]interface{}), "iops")
+								}
+							}
+						}
+					}
+					return nil
+				},
+			}
 
 			if hclOut != nil {
 				logger.Log("msg", "initializing HCL writer")
diff --git a/hcl/writer.go b/hcl/writer.go
index 383edd6564..5460a06d9c 100644
--- a/hcl/writer.go
+++ b/hcl/writer.go
@@ -99,6 +99,13 @@ func (w *Writer) Has(key string) (bool, error) {
 // Sync writes the content of the Config to the
 // internal w with the correct format
 func (w *Writer) Sync() error {
+
+	if w.opts.PreSync != nil {
+		if err := w.opts.PreSync(w.Config["resource"]); err != nil {
+			return fmt.Errorf("unable to pre-sync the HCL configuration: %w", err)
+		}
+	}
+
 	logger := log.Get()
 	logger = kitlog.With(logger, "func", "writer.Write(HCL)")
 
diff --git a/writer/options.go b/writer/options.go
index dd34446d2d..3d85a600af 100644
--- a/writer/options.go
+++ b/writer/options.go
@@ -6,4 +6,8 @@ type Options struct {
 	// variables in HCL files or building dependencies
 	// in a TFState
 	Interpolate bool
+
+	// PreSync is the method to call before the `Sync`
+	// of the writer in order to perform surgicals modification
+	PreSync func(interface{}) error
 }