Jim Smart
March 22, 2017

The first time I sat in my high-school 1967 Mustang hardtop since it was torn apart at the beginning of my career, 32 years ago, it was a disappointing experience. As a very tall person, I had to wonder how I ever got in and out of the darned thing during my adolescence and young adulthood. Perhaps I was more flexible in those days, or maybe I just didn’t know any better. However, I can tell you the legroom in the driver’s seat of a classic Mustang 42 years later doesn’t cut the mustard. I needed and wanted more.

My mind went to work trying to figure out how to get more legroom in a vintage Mustang. I considered fabricating seat extensions myself. Then I reasoned I couldn’t have been the only person at 6-feet, 3-inches tall who was having trouble getting in and out of an old Mustang and figured National Parts Depot (NPD) would have a solution. I went to NPD’s website and discovered seat-track extensions engineered to yield 2 additional inches of legroom. What’s more, they were easy to bolt on and affordable to boot.

These guys are designed to bolt right onto your Mustang’s existing seat tracks. The rear seat-track stud will clear the floorpan. The forward stud must be cut flush with the nut in order to sit level on the carpet. Installation can be accomplished in about one hour.

01. If you’re lacking legroom in a classic Mustang, NPD has the solution in its seat-track extensions, offering 2-inches of additional legroom.

02-03. The NPD seat-track extension kit comes with two extensions per seat. In this case, we have a bench seat, which calls for one of the kits. If you have bucket seats, you’re going to need two kits.

04. Seat-track extensions slip over the factory seat-track studs, as shown flush with the aft end of the seat track so that it sticks out ahead of the track in front. This is your 2-inch setback.

05. A slot in each seat-track extension allows it to clear the spring support. If the slot isn’t placed over the spring bracket, you’ve got it backwards.

06. Install the seat-track extensions toward the back of the seat track, which moves the seat aft by 2-inches.

07. We decided to use internal locking star washers for added security. You may also use flange nuts, which afford you security at the seat-track extender.

08. Our seat-track extenders have been tightened and are ready for installation. You will be amazed at what 2 inches aft can add to your legroom. Doesn’t sound like much, but it is significant.

09. After you installed your NPD seat-track extenders, keep in mind you will have to cut the forward factory seat stud flush to allow the seat to sit flush. The aft seat stud does not have to be cut. If you don’t want to cut the factory seat stud, another option is to drill a 1/2- to 3/4-inch hole in the seat pan to allow clearance for the stud.

10. This is how the seat-track extension looks at the seat pan. The arrows indicate where the factory seat studs go.

11-12. With the seat all the way back, this is how the seat-track extension should look on each side. This installation takes about one hour per seat. If you thought 2-inches wouldn’t seem much different, sit behind the wheel and feel the transformation. You can stretch your legs and sit more naturally with good heel and toe on the accelerator, clutch, and brake pedals.