70-86 Sb Dodge Motorhome

The HEDMAN 70-86 Small Block Mopar Headers for Dodge Motorhome (part number 79030) are a pair of street-performance exhaust headers engineered for the fullsize Dodge van platform spanning 1971–1991 model years. These headers feature a 1.625-inch primary tube diameter flowing into a 3-inch collector, delivering improved exhaust scavenging and horsepower gains compared to stock cast manifolds. The headers arrive with gaskets and hardware included, ready for installation.

Constructed from steel and finished in durable black paint, these headers are built to withstand engine bay temperatures and resist corrosion. The 1.625-inch primary tubes are sized to optimize exhaust velocity for the Small Block Mopar displacement range while maintaining backpressure characteristics necessary for street driving. The 3-inch collector consolidates flow and connects to standard exhaust systems, making these headers compatible with most bolt-on performance exhaust setups for the fullsize van chassis.

These headers address the performance limitations of original cast manifolds, which restrict exhaust flow and contribute to heat soak in the engine bay. Upgrading to tuned headers increases cylinder scavenging, allowing the engine to breathe more efficiently and produce measurable gains in both horsepower and torque. Owners of 1970s–1980s Dodge motorhomes with Small Block Mopar power plants seeking modest but real performance improvement and improved thermal management will find these HEDMAN headers a practical bolt-on solution that maintains street-use compatibility while reducing backpressure.