Ford Performance Ring And Pinion Gear 4.09 Set 8.8" IRS 2015-2020

Ford Performance:
M-4209-88409A
Ford Performance Ring And Pinion Gear 4.09 Set 8.8" IRS 2015-2018 is rated 5.0 out of 5 by 1.
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Highlights

  • For 8.8" Irs Center Section
  • 4.09:1 Gear Ratio
  • Includes OEM Cursh Sleeve
  • OEM Quality
MSRP $349.00
$287.99
You save 17%

Ford Performance 4.09 Ring and Pinion Gear Set for all 2015, 2016, 2017, 2018, 2019 and 2020 Mustangs with the 8.8" IRS Rear End.

Are you looking for a cheap and easy way to modify the Rear Axle of your 2015-2020 S550 Mustang? If so you might be interested in this 4.09 Ring and Pinion Gear Set from Ford Performance. This Ford Performance 4.09 Ring and Pinion Gear Set will accelerate quicker at a higher top speed, with this set from Ford Performance, you’ll have the correct high-quality parts to take full control over your 2015, 2016 or 2017 Mustang.

Features and Benefits:
- Strong Unmatched Forged Construction and Quality
- Quiet Worry-Free Performance
- Corrosion-Resistant Black Oxide Finish
- Perfect for Street or Track Use
- Proudly Made in the USA!
- Professional Installation is Highly Recommended

*Will not fit earlier 8.8-inch straight axles found in previous generations.
*Will not fit 2015-2018 Mustangs originally equipped with a rear-end housing with factory installed 3.15 gears.

Please Note: Requires M4210B3, the 2015-2017 Ford Performance 8.8” IRS Ring & Pinion Installation Kit

Tech Tip: After installation of your new FRPP 4.09 Ring and Pinion Gear Set, you will need to adjust the rear axle ratio in the body control module in order to re-calibrate your speedometer. This can be adjusted for if you have previously purchased one of the new Ford Performance Power Packs for the 2015-2017 Mustang.

The Ford Performance 4.09 Ring and Pinion Gear Set is made in the United States at Ford's Sterling Axle Plant. The lower the ratio (higher the number), the quicker your car will accelerate and you will feel the difference. The Ford Performance Ring and Pinion Gear is the choice of championship road racing and drag racing teams around the world. The Ring and Pinion Gear features a superior surface finish that is hardened for the strongest and quietest performance on the market.

If you're looking for parts for your 2015-2020 Mustang, you should start by looking at the several Mustang parts that CJ Pony Parts offers from Ford Performance (formerly Ford Racing). By buying your Ford Performance parts from CJ Pony Parts, you know you're getting your Mustang parts from a reliable, reputable dealer, since CJ Pony Parts is a Top 10 Ford Performance Dealer and has been for the last 10 years. When you buy your Ford Performance Mustang parts from CJ Pony Parts, you know you have a winning combination.

Purchase a new Ford Performance 4.09 Ring and Pinion Gear Set for your 2015, 2016, 2017, 2018, 2019 or 2020 Mustang with the 8.8" IRS Rear End from CJ Pony Parts today!

Installation Videos

Vehicle Fitment

This product will fit the following Mustang years:

Rated 5 out of 5 by from Great performance improvement! A major improvement from the standard tall gear (3.31). Feels like another 50 HP!! Eliminated the drone at some cruising speeds from the MagnaFlow exhaust.
Date published: 2019-05-18
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Will it fit 2015 gt premium with factory installed 3.55 housing?

Asked by: TylerJT
Yes it will.
Answered by: rk cjpp
Date published: 2020-01-26

2016 gt350. hennesy hpe 750. will this gearset fit the gt350?

Asked by: stevep220
Yes.
Answered by: CJPP Dave
Date published: 2018-01-24

i have a 2016 GT with auto and 3.15 gears, will this gear work in my rear housing if i change the gears and the differential?

Asked by: Rusty2016GT
If you change to the correct rear end housing they will work.
Answered by: rk cjpp
Date published: 2017-12-05

My goal is to improve my 0-100 time by replacing my 3.31 gears, however, I don't want first gear to be useless. Knowing the transmission gear ratio for S550, would you recommend the 4.09 or the 3.73 gear based on my goal?

Asked by: mitchellgolf
3.73 would be a good choice.
Answered by: rk cjpp
Date published: 2020-01-11

my gear is 3.15 its that 4.09 fit my mustang?

Asked by: EdwardL
Will NOT fit 2015-2017 Mustangs originally equipped with a rear-end housing with factory installed 3.15 gears
Answered by: CJPP Dave
Date published: 2017-10-29
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