Monday - Friday, 8am-5pm EST

click to zoom in

Seat Rail Extenders ('99-'04)

(No reviews yet) Write a Review
Proposition 65:
WARNING: Cancer and Reproductive Harm
Click to Download PDF

Seat Rail Extenders ('99-'04)


have questions?

  • Guaranteed Fitment

    Every product test fitted.

  • In-House Experts

    We know suspension.

  • Install Instructions

    Easy to follow instructions.

  • Wordwide Shipping

    via UPS / FedEx / USPS

Dont be cramped when putting your horse through its paces!

Installing our '99-'04 Mustang Seat Rail Extenders repositions the front seats 4" further to the rear providing tall drivers and passengers additional leg room. Like all Stifflers' products, this kit is designed for functionality, appearance and ease of installation!


  • Requires one kit per seat.

Customers Also Viewed


Spider Brace ('99-'04)


Don't suffer any longer with limp front frame rails, put the Spider to work for you and GET STIFF! Finally ... a way to stiffen your front frame rails without installing a 12pt-cage or...


Stiffening Rail ('94-'04)


More than just a place to put your jack... Installed behind the rocker panel pinch weld lip, these rails multi-task by adding strength and stiffness to your Mustangs chassis as well as...


FIT System ('94-'04)


The FIT System is a modular approach to achieving the ultimate  in chassis stiffness and strength through design. By integrating three key components into a modular system, the Fully...


Lower Chassis Brace ('96-'04)


Stifflers' lower chassis brace dramatically increases the strength and stiffness of the front chassis area and factory K-member. This additional stiffness helps to maintain correct front...


Driveshaft Safety Loop ('99-'04)


Stifflers' Driveshaft Safety Loop Engineered to exceed NHRA regulations. This one of a kind driveshaft safety loop will save you and your investment from the destructive effects of a broken...

Worldwide Shipping

via UPS / FedEx / USPS

Buy Direct from Stifflers

or Locate a Dealer

Secure Checkout Guarantee

via SSL Encryption / PCI Compliance

Hassle Free Returns

More Information *
to top