Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $15,000!! Enter Now
Coronavirus: We are Open For Business, Prioritizing health and safety Learn More

SR Performance High Performance Flexplate; 164 Tooth, 8 Bolt (99-Mid 01 GT; 03-04 Mach 1; 11-14 GT)

Item 383725
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $113.99 You Save 7% ($8.00)
Our Price


FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

      Product Information

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


      • 8 Bolt Crank Pattern
      • 164-Tooth
      • Chromoly Steel Construction
      • 0.035" Thicker Than Stock
      • Platinum Finish
      • SFI 29.1 Certified
      • Fits 1999-Mid 2001 GT, 2003-2004 Mach 1, 2011-2014 GT


      Direct Bolt-on Replacement. Has your factory flexplate failed in your automatic Mustang? Then replace it with a brand new SR Performance Flexplate from AmericanMuscle. This direct bolt-on flexplate features a ring gear of 164 teeth, as well as a 8-bolt crank pattern.

      Chromoly Steel Construction. This SR Performance Automatic Flexplate is constructed from cold-rolled chromoly steel and is 0.035" thicker than stock for extra strength and features a long lasting platinum finish that helps prevent the formation of rust.

      SFI 29.1 Certified. If you're using this flexplate in high performance or racing applications, SFI Certification is critical so you can run your Pony at the track or strip. And it's great for peace of mind even in a daily driver - at higher RPMs, stock cast flexplates have been known to explode.

      Application. The SR Performance Flex-plate is specifically designed to fit the 1999-Mid 2001 GT, 2003-2004 Mach 1, and 2011-2014 GT Mustangs with an automatic transmission and a eight bolt main crank.

      Technical Note. This SR Performance Flexplate has an 8 bolt main that is found in the 1999-mid 01 Mustang GT's with production date ending on 06/01, 2003-2004 Mach 1's, and 2011-2014 GT's.

      Please Note. Romeo built engines have 6 bolt cranks and Windsor built engines have 8 bolt cranks. If the 8th character in the VIN is an "X" its a Windsor block, if the 8th character in the VIN is a "W" it is a Romeo block. If unsure please check with your Ford dealer to determine if you have a 6 or an 8 bolt main.

      SR Performance

      Fitment: 1999 2000 2001 2003 2004 2011 2012 2013 2014 Details

      MPN# 383725

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (10)

      Write a Review

      Ratings Summary

      3.3 out of 5 overall rating from 10 customers

      Installation Time: Full Day

      Installation Cost: $500-$1000

      • January 18, 2019

        1 1999 GT - JanC Installation Time: Afternoon

        mustang gt . flexplate

        the 4 bolts for converter does not fit, and the 8 bolts for the engine, is there 3 bolts there not fit - so bad fitment will not recoment this produkt .

        Helpful (0)
      • February 20, 2018

        5 1998 GT - NeilN Installation Time: Shop Install Installation Cost: $500-$1000

        98 GT with 2000 PI engine swap

        Flywheel worked perfectly!! Needed to do an engine swap from a Romeo to a Windsor PI engine which takes the 8 bolt pattern, works great!

        Helpful (13)
      • December 05, 2017

        2 2004 Mach 1 - DArtist

        It's what I want but it's not a "Direct Blot On"

        You will have to drill bigger holes for the Torque converter.

        Helpful (12)
      • November 07, 2017

        5 2001 GT - TonysAutomotive Installation Time: Shop Install Installation Cost: $250-$500

        8 bolt flex plate

        Great flex plate for the money! I needed a 8 bolt flex plate to replace my 6 bolt when I installed the new built crate motor for this mustang.

        Helpful (12)
      • October 02, 2017

        5 2011 GT - Jacob Installation Time: Afternoon

        Awesome product

        I bought this to add more strength and there is def a big difference between stock and this one love it. One less thing I have to worry bout breaking now.

        Helpful (12)
      • April 20, 2017

        1 1991 Other - JasonP


        The holes didn't lineup at all. Torque converter holes were way off

        Helpful (12)
      • November 01, 2016

        3 2001 Other - Pete

        8 bolt 4R70 Flywheel

        Good thing I researched flywheel first as I fit the converter first and Had to drill/ream the converter holes for the 4R70 same as the rest of you. It is a price friendly part as long as you know to fit before trying to install trans.

        Helpful (12)
      • August 12, 2016

        2 2002 GT - Brandon274

        Flexplate broke after 300 miles

        I don't think this flexplate is made for 'high performance'. I'm at about 570 horsepower at the flexplate, and the flexplate tore around the bolt holes. Lesson learned: don't go cheap.

        Helpful (13)
      • July 17, 2015

        5 2000 GT - Dmax Installation Time: Afternoon

        Good product

        Perfect fit. A lot better built than the own one. I would recommend this product

        Helpful (12)
      • July 16, 2015

        4 2001 GT - birdman Installation Time: Afternoon

        Needs mods out of the box

        I installed this in a 2001 Mustang GT, new motor w/forged 8 bolt crank. There are 2 torque converter bolt patterns on the Mustangs. One is 10.65" , and the other is 11.44 inches. It fits the crankshaft just fine. This flex plate has a 10.5" pattern which will NOT fit a 10.65" pattern converter. I was able to make it work with the assistance of my Dremel. I did call AM and let them know, so hopefully they can have their vendor make it so it fits the 10.65" converters with no modification. Also, I knew in advance that there might be the converter pattern issue BEFORE installation, so I was not forced to try and install the motor and pull it out again. Other than that, good, beefy product.

        Helpful (14)

      Questions & Answers (1 answers)

      1 Top Rated Question

      does this flywheel have the 10 and 3/4 converter bolt pathern

      • This flywheel will feature an 8 bolt crank pattern. This will fit 1999- Mid 2001 GT, 2003-2004 Mach 1's, and 2011-2014 GT's with an automatic transmission and a 8 bolt main crank.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) flexplate

      Will It Fit My Mustang

      • GT - 99, 00, 01, 11, 12, 13, 14
      • Mach 1 - 03, 04

      Fits 8 bolt main only

          Related Mustang Categories