VAC Universal Seat Extender – More Legroom for Tall Drivers
Big Man Certified Comfort & Safety
At VAC Motorsports in Philadelphia, we engineer solutions that solve real problems for real drivers.
This seat extender was originally developed after a 6'6" driver couldn't get comfortable behind the wheel because the factory seat simply didn’t travel far enough.
Driving too close to the steering wheel isn’t just uncomfortable—it can also be unsafe in the event of airbag deployment.
The VAC Universal Seat Extender relocates the factory seat mounting position rearward by up to 4 inches (100mm), allowing taller drivers to achieve a safer and more natural driving position.
Originally engineered for performance vehicles with flat seat mounting surfaces, this system can also work with many other vehicles including trucks, classic cars, hot rods, and custom builds that share similar seat mounting geometry.
How To Determine If It Will Fit Your Vehicle
Because this product works with factory seat mounting geometry, determining compatibility is simple.
Step 1 – Remove the Factory Seat
Unbolt the factory seat from the floor. You can typically leave the seat wiring connected.
Step 2 – Measure Front to Rear Mounting Distance
Measure the distance front to rear on your drivers seat.
Measure from the center of the front mounting hole to the center of the rear mounting hole.
Important: Measure front to rear only — NOT side to side.
Seat Mount Measurement Diagram
Measure front to rear from the center of the front mounting hole to the center of the rear mounting hole on the same seat rail.
FRONT OF VEHICLE
↑
Front Mount Hole ●
│
│
│
│ Measure This Distance
│
│
│
Rear Mount Hole ●
↓
REAR OF VEHICLE
Front and rear seat mounts must be on the same flat plane.
Version Compatibility
V1 Seat Extender
- Fits front-to-rear seat mounting distances of 13.22" – 14.53"
V2 Seat Extender
- Fits front-to-rear seat mounting distances of 14.72" – 16.03"
Floor Mount Requirements
For proper installation the vehicle must have:
- Flat seat mounting surfaces
- Front and rear mounts on the same plane
Vehicles with raised seat rails or stepped floor pans are not compatible with this system.
Key Features
- Extends factory seat mounting position up to 4 inches (100mm)
- Creates significantly improved legroom for taller drivers
- Precision CNC machined billet aluminum construction
- Manufactured in-house in Philadelphia
- Direct bolt-in installation using factory mounting points
- No cutting or permanent modifications required
- Seat can easily be returned to the original position
- Developed and tested with tall drivers — Big Man Certified
What's Included
- (2) Billet Floor Mount Extenders
- (2) Flange Bolts – M10 × 1.5 × 20mm
- (2) Flange Bolts – M10 × 1.5 × 30mm
- (2) T-Nuts – M10 × 1.5
Installation Overview
- Unbolt the factory seat from the floor
- Position the VAC seat extenders in the mounting locations
- Secure using factory hardware and supplied bolts
- Torque all hardware to OEM specifications
- Confirm the seat slides properly and locks securely
Typical install time: 30–45 minutes with basic tools.
Why Proper Seat Position Matters
Correct driving position improves:
- Driving comfort
- Steering control
- Pedal modulation
- Airbag clearance
For taller drivers, the difference is immediate.
Drive comfortably. Drive safely. Drive VAC.