Mopar A-Body Main Hoop

The Mopar A-Body Main Hoop from Competition Engineering is a dedicated chassis reinforcement system engineered for serious A-body Chrysler, Dodge, and Plymouth muscle cars and street machines. Built for drivers who demand structural integrity during hard cornering, launch loads, and road course work, this main hoop addresses flex and chassis twist that stock frames cannot handle. Whether you're upgrading a classic 1970 Dodge Dart, Plymouth Duster, or Chrysler Valiant for performance driving, this hoop is essential safety equipment that transforms chassis rigidity.

Constructed from high-strength tubing, the main hoop integrates directly into the A-body frame architecture to distribute lateral and vertical loads across the entire chassis rather than concentrating stress at isolated points. The 42.75-inch width and 54-inch height dimensions are precision-calculated to fit A-body wheelhouses and door jambs without interference with interior panels or steering components. At 23.3 pounds, the assembly adds minimal mass while dramatically increasing bending and torsional stiffness—critical for vehicles running aggressive suspension geometry, turbochargers, or high-horsepower engines where stock frames exhibit catastrophic flex.

This hoop is ideal for builders pursuing autocross dominance, road course competition, or weekend warrior duty on stock A-body platforms. Installation requires welding to frame rails and interior mounting points—professional fabrication is strongly recommended to ensure proper load transfer and safety. Competition Engineering's proven design has become the industry standard for A-body restoration shops and high-performance build specialists who refuse to compromise structural integrity for aesthetics.