64-72 A-Body H-Bomb Crossmember Back Exhaust

The PYPES Performance Exhaust 64-72 A-Body H-Bomb Crossmember Back Exhaust is purpose-built for classic Mopar enthusiasts seeking to unlock the full potential of their A-Body platform vehicles. This complete bolt-on system is engineered for 1964–1972 Dodge and Plymouth models including the Barracuda, Duster, Valiant, and Scamp, delivering both functional performance gains and period-correct aesthetics. The H-Bomb designation refers to the premium mandrel-bent tubing construction and optimized flow characteristics that modern shops recognize as the gold standard for vintage American muscle car restoration and modification.

PYPES Performance has engineered this crossmember-back configuration to maximize scavenging efficiency while maintaining structural integrity in vehicles that may carry elevated engine outputs. The mandrel-bent design minimizes turbulence and flow restriction compared to traditional crush-bent alternatives, resulting in measurable horsepower and torque delivery improvements across the RPM band. The system's strategic tube diameter and exit positioning reduce back-pressure without sacrificing under-car clearance, critical for A-Body chassis geometry where vintage suspension and rear-end configurations demand precision fitment. Stainless steel or aluminized steel construction options resist corrosion and heat degradation, ensuring longevity in both street and strip environments.

Restorers and performance builders benefit most from this bolt-on system because it preserves originality while addressing factory exhaust limitations that throttle breathing on upgraded engines. Installation integrates seamlessly at the crossmember break point, making it compatible with factory manifolds, aftermarket headers, and various small-block or big-block Mopar powerplants commonly found in these chassis. The 80-pound assembly ships ready for mounting, with precise engineering that eliminates fitment guesswork typical of older reproduction items. Whether your A-Body is a show car demanding visual correctness or a street machine requiring flow optimization, this exhaust delivers the engineering credibility that separates serious builds from budget compromises.