diff --git a/Configuration/Eras/python/ModifierChain_trackingMkFitProd_cff.py b/Configuration/Eras/python/ModifierChain_trackingMkFitProd_cff.py
index 448e0cad2e17a..920d59ee813d1 100644
--- a/Configuration/Eras/python/ModifierChain_trackingMkFitProd_cff.py
+++ b/Configuration/Eras/python/ModifierChain_trackingMkFitProd_cff.py
@@ -8,6 +8,7 @@
 from Configuration.ProcessModifiers.trackingMkFitDetachedQuadStep_cff import *
 from Configuration.ProcessModifiers.trackingMkFitDetachedTripletStep_cff import *
 from Configuration.ProcessModifiers.trackingMkFitPixelLessStep_cff import *
+from Configuration.ProcessModifiers.trackingMkFitJetCoreRegionalStep_cff import *
 
 trackingMkFitProd =  cms.ModifierChain(
     trackingMkFitCommon,
@@ -17,4 +18,5 @@
     trackingMkFitDetachedQuadStep,
     trackingMkFitDetachedTripletStep,
     trackingMkFitPixelLessStep,
+    trackingMkFitJetCoreRegionalStep,
 )
diff --git a/Configuration/ProcessModifiers/python/trackingMkFitJetCoreRegionalStep_cff.py b/Configuration/ProcessModifiers/python/trackingMkFitJetCoreRegionalStep_cff.py
new file mode 100644
index 0000000000000..51b04d9718267
--- /dev/null
+++ b/Configuration/ProcessModifiers/python/trackingMkFitJetCoreRegionalStep_cff.py
@@ -0,0 +1,4 @@
+import FWCore.ParameterSet.Config as cms
+
+# This modifier sets replaces the default pattern recognition with mkFit for JetCoreStep
+trackingMkFitJetCoreRegionalStep = cms.Modifier()
diff --git a/RecoTracker/IterativeTracking/python/JetCoreRegionalStep_cff.py b/RecoTracker/IterativeTracking/python/JetCoreRegionalStep_cff.py
index bd69444c15cc6..8d2cee146d43c 100644
--- a/RecoTracker/IterativeTracking/python/JetCoreRegionalStep_cff.py
+++ b/RecoTracker/IterativeTracking/python/JetCoreRegionalStep_cff.py
@@ -217,6 +217,30 @@
     #onlyPixelHitsForSeedCleaner = cms.bool(True),
 )
 
+
+from Configuration.ProcessModifiers.trackingMkFitJetCoreRegionalStep_cff import trackingMkFitJetCoreRegionalStep
+import RecoTracker.MkFit.mkFitSeedConverter_cfi as mkFitSeedConverter_cfi
+import RecoTracker.MkFit.mkFitProducer_cfi as mkFitProducer_cfi
+import RecoTracker.MkFit.mkFitIterationConfigESProducer_cfi as mkFitIterationConfigESProducer_cfi
+import RecoTracker.MkFit.mkFitOutputConverter_cfi as mkFitOutputConverter_cfi
+jetCoreRegionalStepTrackCandidatesMkFitSeeds = mkFitSeedConverter_cfi.mkFitSeedConverter.clone(
+    seeds = 'jetCoreRegionalStepSeeds',
+)
+jetCoreRegionalStepTrackCandidatesMkFitConfig = mkFitIterationConfigESProducer_cfi.mkFitIterationConfigESProducer.clone(
+    ComponentName = 'jetCoreRegionalStepTrackCandidatesMkFitConfig',
+    config = 'RecoTracker/MkFit/data/mkfit-phase1-initialStep.json',
+)
+jetCoreRegionalStepTrackCandidatesMkFit = mkFitProducer_cfi.mkFitProducer.clone(
+    seeds = 'jetCoreRegionalStepTrackCandidatesMkFitSeeds',
+    config = ('', 'jetCoreRegionalStepTrackCandidatesMkFitConfig'),
+    #clustersToSkip = 'jetCoreRegionalStepClusters',
+)
+trackingMkFitJetCoreRegionalStep.toReplaceWith(jetCoreRegionalStepTrackCandidates, mkFitOutputConverter_cfi.mkFitOutputConverter.clone(
+    seeds = 'jetCoreRegionalStepSeeds',
+    mkFitSeeds = 'jetCoreRegionalStepTrackCandidatesMkFitSeeds',
+    tracks = 'jetCoreRegionalStepTrackCandidatesMkFit',
+))
+
 # TRACK FITTING
 import RecoTracker.TrackProducer.TrackProducer_cfi
 jetCoreRegionalStepTracks = RecoTracker.TrackProducer.TrackProducer_cfi.TrackProducer.clone(
@@ -355,3 +379,7 @@
 fastSim.toReplaceWith(JetCoreRegionalStepTask, 
                       cms.Task(jetCoreRegionalStepTracks,
                                    jetCoreRegionalStep))
+                      
+_JetCoreRegionalStepTask_trackingMkFit = JetCoreRegionalStepTask.copy()
+_JetCoreRegionalStepTask_trackingMkFit.add(jetCoreRegionalStepTrackCandidatesMkFitSeeds, jetCoreRegionalStepTrackCandidatesMkFit, jetCoreRegionalStepTrackCandidatesMkFitConfig)
+trackingMkFitJetCoreRegionalStep.toReplaceWith(JetCoreRegionalStepTask, _JetCoreRegionalStepTask_trackingMkFit)