Tunnel Ram vs. Single Plane Intake for Big Block Chevy: Which Delivers the Power You Need?
When it comes to maximizing the performance of your Big Block Chevy (BBC), few decisions are as crucial—or as debated—as the choice between a tunnel ram and a single plane intake manifold. Both setups have dedicated followings and offer distinct advantages depending on your build, power goals, and intended application. Understanding how each intake design affects airflow, torque, and horsepower will help you make the right call for your engine.
Tunnel ram intakes are designed with long, straight runners and dual carburetor mounting pads, typically rising high above the intake valley. This layout is ideal for high-RPM engines and drag racing setups where top-end horsepower is the primary objective. By increasing plenum volume and minimizing turbulence, tunnel rams enhance air/fuel distribution and support maximum airflow at wide-open throttle. The trade-off? Low-end torque can suffer, and hood clearance becomes a serious concern for street cars. 
Single plane intakes—also known as open plenum intakes—are more compact and efficient across a broader RPM range. With a single shared plenum feeding all cylinders, they offer great throttle response and mid-range power, making them a popular choice for street/strip builds, class racing and bracket racing. While they may not match the peak horsepower of a well-tuned tunnel ram, single plane manifolds offer better drivability and are easier to tune with a single carb setup. 
Ultimately, if you're chasing every last bit of horsepower for heads-up drag racing or high-RPM competition, a tunnel ram may be your weapon of choice. But if you're looking for versatility, cleaner packaging, and solid performance from 4,500-7,000+ RPM, a single plane intake is hard to beat. At Virtual Speed Performance, we carry a range of both styles—new and used—backed by racer knowledge and real-world experience. Visit our intake selection to find the right intake solution for your BBC build.
