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OPR Replacement Stock Exhaust Manifold - Driver Side (99-04 V6)

Item 101993
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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Stock Replacement Exhaust Manifold
      • Cast Iron Construction
      • Natural Finish
      • Ford Motor Company Equivalent Part# XR3Z-9431-BC, XR3Z-9431-DC
      • For Left - Driver Side Only
      • Sold Individually
      • Fits 1999-2004 3.8L/3.9L V6 Mustangs


      Restoration or Repair. If you are restoring your V6 Mustang back to stock or just need to replace a cracked exhaust manifold then this high quality replacement is the perfect part for a maintenance repair or high end restoration.

      OEM Quality. Manufactured to the original factory specifications from cast iron this OPR replacement driver side exhaust manifold includes a gasket and two studs to provide a perfect fit for reliable maintenance-free operation.

      Application. This OPR replacement driver side cast iron manifold is designed to fit all 1999-2004 V6 Mustangs including the 3.8L and 3.9L engine versions.

      Ford Motor Company equivalent part# XR3Z-9431-BC, XR3Z-9431-DC


      Fitment: 1999 2000 2001 2002 2003 2004 Details

      MPN# 101993

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (28)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 28 customers

      Installation Time: Full Day

      Installation Cost: $100-$250

      • December 05, 2019

        5 2000 V6 - MauricioH Installation Time: Afternoon

        Exhaust manifold

        They work just as good as the factory ones. The bottom of my Stang got pelted by gravel and left many holes on the headers which made a horrendous sound when you hit the gas. Glad they sold these on here. Thanks A.M.

        Helpful (0)
      • February 20, 2019

        Review shared from OPR Replacement Stock Exhaust Manifold - Passenger Side (99-04 V6)

        5 2001 V6 - Ryuu Installation Time: Afternoon

        no more tick sound

        took about an hour and a half to install with hand tools. thankfully didn't break any bolts. got rid of that awful tick sound. fit great

        Helpful (4)
      • January 26, 2019

        5 2000 V6 - EllisH Installation Time: Shop Install Installation Cost: 0-$100

        OEM Fit

        Fits perfect, better build than original OEM Headers

        Helpful (3)
      • January 12, 2019

        Review shared from OPR Replacement Stock Exhaust Manifold - Passenger Side (99-04 V6)

        5 2000 V6 - EllisH Installation Time: Afternoon


        Exact bolt on, not to hard of instal recommend helping hand

        Helpful (3)
      • November 24, 2018

        1 2000 V6 - AlejandroA Installation Time: Afternoon

        It was missing a piece

        I ordered it and it only came with the exhaust manifold and not the gasket

        Helpful (4)
      • November 18, 2018

        Review shared from OPR Replacement Stock Exhaust Manifold - Passenger Side (99-04 V6)

        5 2002 V6 - RoyJ

        Exhaust inside car

        Great value and no more fumes inside car. It took 2 hrs for each side.

        Helpful (4)
      • December 01, 2017

        4 2004 V6 - oh4pony

        OEM replacement exhaust manifold

        I had a shop do the install. They did not tell me of any difficulties. They did say the part was a Dorman brand. I personally prefer a quiet car. If I wanted a low rumble exhaust, I would have bought a V8.

        Helpful (10)
      • November 20, 2017

        Review shared from OPR Replacement Stock Exhaust Manifold - Passenger Side (99-04 V6)

        5 2001 V6 - Jennifer Installation Time: Shop Install

        2001 Mustang maintenance

        Seems to be great, mechanic installed it with no issues, car runs beautifully

        Helpful (8)
      • November 18, 2017

        5 2000 V6 - DanielH Installation Time: Afternoon

        Exhaust manifold

        Works great fixed the common exhaust manifold crack

        Helpful (9)
      • October 03, 2017

        5 2000 V6 - EduardoC Installation Time: Afternoon

        Driver Manifold

        Worked great and got strength back compared to the cracked manifold.

        Helpful (9)

      Questions & Answers (3 answers)

      3 Top Rated Questions

      Do these replacements lead to a deeper exhaust note?

      • These will not deepen the exhaust tone, they are a straight stock replacement.

      Helpful (0)

      Is there warranty on these parts and how long is it ?

      • The OPR Replacement Stock Exhaust Manifold will carry a 30 day warranty.

      Helpful (0)

      This is exhaust manifold is described as being "maintenance free." Also its made of cast iron where I believe the stock manifold is aluminum. Its well known that the stock manifold is most likely to crack with the most likely source of the problem being the a/c compressor drip. Is this somehow guaranteed not to crack from the same a/c drip?

      • Cast iron is the heaviest toughest metal made for cars, they do not crack under normal situations. I would recommend calling our experts for better assistance or further help getting the best product for you needs.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Driver side exhaust manifold
      • (1) Manifold Gasket
      • (2) Studs

      Tech Specs

      Header Specifications
      Header Type:Stock Manifold Finish :Natural
      Type Mid Pipe Required:StandardFitment:1999-2004 V6 Mustangs

      Will It Fit My Mustang

      • V6 - 99, 00, 01, 02, 03, 04