2500 Series Air Spring | 8″ Stroke | 6″ Diameter
The Industry Standard for Classic Vehicles delivering Big-Block support with modern comfort and Performance: While traditional 2500-style bags stop short, ours are engineered to go the distance with nearly 8 inches of massive usable stroke. Compressing down to 2.8″ and extending all the way to 10.5″, you aren’t just getting more lift—you’re getting a more dynamic, cloud-like ride.
Why the 2500 Series is the Pro-Builder’s Choice:
- More Stroke = Less Pressure: The extended 8″ travel allows you to achieve your desired ride height with lower PSI, delivering a smooth, responsive feel that inferior, short-stroke bags just can’t match.
- Big Block & Big Wheel Ready: Whether you’re dropping a cast-iron 454 into a classic or tucking 20-inch rims, these bags are built for the weight. With a 2,096 lb max load rating at 100 PSI, they handle heavy classics and passenger weight without compromise.
- Control Arm Optimized: Engineered specifically for the pivoting motion of classic front ends, the 2500 Series maintains stability through its entire arc, giving you the massive stroke needed for laying it out at the show or clearing pipes on a steep driveway.
- Heavy-Duty Construction: Featuring a steel-braided waistband and a 600 PSI burst rating, these bags are built to perform under pressure for the long haul.
Pro-Installer Clearance Tips:
Our air springs are built to perform under pressure, but even the toughest rubber can’t win against a sharp edge on a frame rail or a hot exhaust pipe. Because every vintage chassis is unique, ensuring your bags have “room to breathe” is a critical part of the installation:
- Three-Stage Clearance Check: You must verify your clearance at three critical stages: Fully Compressed (Slammed), Normal Ride Height, and Fully Extended (Lifted).
- The “Hand-Sweep” Test: Throughout the entire suspension cycle—and especially at full steering lock—you must maintain a visible safety gap around the entire circumference of the bag. You should be able to freely sweep your hand around the bag at every stage of travel without it contacting the frame or any sharp edges.
- Zero-Contact Policy: Any contact between the rubber and a metal surface – including hot exhaust pipes will lead to premature failure. If the clearance is tight at any point in the suspension’s motion, additional trimming or adjustment is required.
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