“Bigger isn’t always better,” says four-time NHRA Pro Stock champ Greg Anderson, about the diameter of exhaust header primary tubes.
In this short tech tip video from Summit Racing and Powerblock TV, you’ll hear Anderson explain that, while smaller-diameter primaries may create less volume, they generate faster exhaust-flow velocity which improves your vehicle’s low- and mid-range torque.
You’ll hear about how full-length, or long-tube headers produce the most power, but that crowded engine compartments sometimes require shorties.
Mild steel is budget-friendly. Stainless steel provides the most ooomph.
In short: Tubular headers are one of the best bolt-on power adders available.
Check it out.
How bout a 454 BBC, with a 590 lift cam, 049 heads with 2.19/1.88 valves and 2″ primary and 3 1/2 ” collector headers? 3″ exhaust, all in a 70 El Camino? Too much?