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  1. GForce S550 Axles & 31 spline 99-04 Cobra Axles back IN STOCK!!

    Hey all! We just got a fresh shipment of GForce Engineering Axles for S550 Mustangs and 99-04 Cobra’s (IRS) GForce had been producing high quality drivetrain components various different applications for years, producing some of the strongest axles, rear ends, and more! GForce FOR10103A...
  2. GForce S550 Axles & 31 spline 99-04 Cobra Axles back IN STOCK!!

    Hey all! We just got a fresh shipment of GForce Engineering Axles for S550 Mustangs and 99-04 Cobra’s (IRS) GForce had been producing high quality drivetrain components various different applications for years, producing some of the strongest axles, rear ends, and more! GForce FOR10103A...
  3. GForce S550 Axles & 31 spline 99-04 Cobra Axles back IN STOCK!!

    Hey all! We just got a fresh shipment of GForce Engineering Axles for S550 Mustangs and 99-04 Cobra’s (IRS) GForce had been producing high quality drivetrain components various different applications for years, producing some of the strongest axles, rear ends, and more! GForce FOR10103A...
  4. Replacing Rear End

    So my rear end is growling when I’m on the highway and let off the gas. Shop I talked with said they would just put in a whole new rear end instead of trying to diagnose the part that needs to be replaced. I have a 15 GT automatic with 3.15 gears though. Should I just buy this from LMR and get...
  5. Broken stock half shaft.. enlighten me on the GT350 shafts?

    It finally happened… dropped the clutch, tires hooked, and heard a loud pop. I’m NA with a tune, headers and catback only and I’m thinking of going with the GT350 half shafts because of their price. Does anyone have any experience with the power and abuse they can handle??? Let just say I abuse...
  6. Am I Missing A bolt ? Help

    Hey All, so i had the Pedders Xa installed on the car but i ended up hearing a lot of clunking from the rear. While looking around the IRS , I found these , is it normal for the thread to be that way without a nut. Is that the reason for the clunk noise when i go over bumps and unever roads.
  7. Suspension Upgrades!

    Hey all! Treated myself to a few Steeda goodies this past Black Friday/Cyber Monday, to include the Stop-the-Hop Kit, Extreme G-Trac K-Member Brace and the Adjustable Differential Bushing Inserts. Can anyone recommend Mustang-specific, or all around good, mechanics and shops I can go to to...
  8. AED S550 Knuckles Exclusive at TBR

    Who wants to run up to a 15x12.5" wheel on their S550!!! Now you can, the new AED 15-19 Knuckles now available exclusively at Team Beefcake Racing. Limited Supply available! AED Rear IRS Knuckle fits 15x12 Wheel (15-19 Mustang) * In Stock!
  9. Did they seriously Spray Foam the IRS?

    I was just looking at Full Tilt Boogie Racing's website cause I want their diff cooler kit. I happened to notice something in their install photos. Something, to my knowledge, has not been discussed here. It looks like they filled the insides of their IRS with SPRAY FOAM INSULATION!!! The stuff...
  10. Arizona Steeda IRS Subframe Bushing Support System BRAND NEW

    Bought a full Steeda suspension kit for the car turned out this part was already installed. I lost them in the garage just found them. Too late to return. Asking $100 Shipped. From Steeda Website: This Steeda S550 Mustang IRS Subframe Bushing Support System for your 2015-2019 Mustang GT...
  11. Steeda's S550 Mustang IRS Subframe Alignment Kit - 15% Off (Limited Time)

    Hello All: We are now offering our S550 Mustang IRS Subframe Alignment Kit at a 15% savings...
  12. 2015 GT Premium - Roush Supercharged

    Hello, I have my 2015 GT Premium 22k miles (Brand New Supercharger Installed at 12k) for sale. It is my Daily Driver and Show Car. Phase 1 Roush Supercharged MMR crank gear and OPG ATI Balancer JLT Separator Driver and Passenger Straight Pipe with Race Resonator and Borla S Mufflers Bmr IRS...
  13. Steeda Rear IRS Bushing Inserts

    SOLD!
  14. Available soon from J&M Products/hotpart.com. P/N 25410 IRS Rear Toe Adjustment Link

    Soon to be available from J&M Products/hotpart.com, 2015-2018 IRS Rear Toe Adjustment Links Part # 25410. Available in Black and Red Powdercoated finish, Made in the USA. J&M Products/hotpart.com [email protected]
  15. J&M's New IRS Rear Toe Adjustment Links P/N 25410

    Soon to be available from J&M Products/hotpart.com, 2015-2018 IRS Rear Toe Adjustment Links Part # 25410. Available in Black and Red Powdercoated finish, Made in the USA. J&M Products/hotpart.com [email protected]
  16. Best practices/gotchas for install of Steeda suspension upgrades?

    I'm preparing for a major overhaul of my GT non-PP suspension with all-Steeda parts, and I'm looking for best practices or known "gotchas." I've wrenched before; shocks/springs/head gasket/water pump/brakes/etc. but I'm no "semi-pro mechanic." As I've never worked on a Mustang before I figure...
  17. BMR VERSUS STEEDA IRS

    Not sure which to fit , what have you fitted and your opinions on these . Will be fitting these when I fit springs cheers
  18. IRS Rear Vertical Links Coming Soon J&M Products

    2015-2017 Mustang IRS Rear Vertical Links Wtih Spherical Bearings - J&M Products J&M Products has designed and manufactured all new Mustang Billet Aluminum Vertical Links for the 2015-2017 Mustang S550 GT, EcoBoost, and V6, constructed from aircraft grade 6061-T6511 aluminum. These all...
  19. Adjusting camber in the rear?

    Is the circled (red) bolt the correct bolt to adjust the camber in the rear? To make a long story short, I was in a fender bender and the upper control arm got broken on the rear passenger side (hydroplaned into a curb trying to miss another car and the force of impact broke it). Once they...
  20. Steeda IRS Braces

    I installed Steeda's IRS Braces about 6 weeks ago and have put about 1k miles on the car since. I could tell a difference immediately. Car just felt stiffer. Install was a breeze. Did it by myself in about an hour. Paired with the Air Lift suspension this combination is amazing. Car handles like...


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