Ordered the IRS center and knuckles today…
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Ordered the IRS center and knuckles today…

I ordered the IRS center and knuckles from Mike Forte. As a result, I saved about $300 vs Factory Five pricing.

Related notes live on the Factory Five Cobra build hub.

End-of-year deal at Forte’s Parts

End of year deals continue. I’ve been chatting with Mike Forte of https://fortesparts.com. He has been in business for 38 years!

Wow. Congrats Mike! Seriously give him a call. His prices are great. Also, he’s just plain a great guy!

IRS center and knuckles

Anyhoo… he has a few of the IRS centers left. Therefore it’s about $300 savings from Factory Five. Sorry guys. Saving $300 gets me other stuff!

First, 3.55 gears. Then Traction-Lok. Besides that, it’s cheaper. What else could I ask for?

IRS center and knuckles
SUPER 8.8″ IRS DIFFERENTIAL 3.55 AND KNUCKLE KIT

What’s in the IRS center and knuckles package

The newer 8.8 center sure looks sexy. This is my first time with an IRS setup. Meanwhile, my son’s older Mustang had an 8.8″ live axle with posi. That axle was a heavy beast.

Here’s what’s included.

2015+ Mustang rear components for use in Factory Five Type MK4 Roadster in a special package! It includes both the 8.8″ IRS differential and the knuckle kit with toe bearing. Both items have a combined value of $1639 and Mike has it for just $1240!
  • Loaded differential housing for Mustang IRS
  • Fits 2018-2019 Mustang 
  • Iron housing with aluminum cover
  • Includes 3.55:1 gear set M-4209-88355A and Traction-Lok differential M-4204-M
  • Original Equipment on 2019 Mustang GT   
  • IRS center and knuckles

    Drive yoke note and delivery update

    Quick note: the new IRS from Ford needs a different drive yoke. Also, that yoke adds about $148.00.

    I’m super excited. However, I’m also worried. Because we’re epoxy coating the garage just after Christmas. So I need the garage spotless!

    Fingers crossed. Ultimately I can store the IRS while the work bay is coated.

    Update: the parts were delivered. Still, EEK! FedEx did a poor job protecting the package!

    IRS center and knuckles

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