AFE Magnum FORCE 4-1/4" ID x 3" Polyurethane Hump Coupling Kit with Clamps DS-F58 Timbren engineered their hollow rubber

Timbren engineered their hollow rubber springs to deliver a progressive spring rate

Whether you're running GM or aftermarket idler and pitman arms

all of these fail

Designed through years of R&D and extensive dyno testing

these dual rate springs utilize a softer initial spring rate over factory for improved on-road comfort

AFE Magnum FORCE 4-1/4" ID x 3" Polyurethane Hump Coupling Kit with Clamps DS-F58 Timbren engineered their hollow rubberYour truck works hard and every connection in the intake system needs to hold up. This Magnum FORCE 4 1 4" x 3" hump polyurethane coupling keeps your setup tight, flexible, and ready for the road. No slipping, no cracking, just solid performance you can trust! Made from heavy duty polyurethane, this coupling handles heat, movement, and vibration like a pro. Its flexible, injection molded design resists tearing and deformation while keeping air flowing