Flowtech Upright Headers
Our new upright Headers are the perfect combination of quality and value. We start by using heavy duty 16-gauge 409 Stain-less Steel tubing for corrosion resistance and durability. The primary tubes are mandrel-bent on a CNC machine providing consistent tubing diameters and reducing air flow restrictions. These improvements increase the cylinder scavenging effect, improving the overall breathing capability of your engine.
Flowtech upright headers are available in 2 versions for Small Block Chevys. The 1-5/8” primary tube design is perfect for most stock and mild cam engines. If you’re running a stroker motor or have a compression ratio above 12:1 we recommend our 1-3/4” primary tube headers. Both versions feature a 3” merged collector along with a welded-in collector spear to make the transition from the primary tubes to the collector as smooth as possible.
These components help to improve the flow and performance of the header, maintaining exhaust velocity and improving volumetric efficiency. Flowtech uses a 3/8” thick header flange for years of leak-free performance. And the primary tubes are TIG welded to the flanges increasing the overall strength and durability of the headers.
So whether you’re running a derby car at the county fair, your hooked to a pulling sled, or just getting down and dirty in the mud, Flowtech’s new upright headers are the perfect combination of functionality and performance no matter what you choose to drive. Upright headers are designed for use in Non-Emissions Controlled Vehicles and Racing Vehicles only.
Flowtech headers and header accessories are available anywhere Holley products are sold.
Holley Releases 2011-17 Coyote Mustang Complete Nitrous Kits| 04/03/2018
They contain everything you need in one convenient kit and support up to 250 rear-wheel horsepower.
Holley Releases Mr. Gasket Transmission Oil Pan Kits| 03/30/2018
They're available for GM Powerglides and Turbo Hydramatics, Ford C4s and C6s, and Chrysler TorqueFlites.
NOS Releases Giant Assortment of New Nitrous Products in Black| 05/21/2018
Take your pick from a 5th Gen Camaro trunk bottle-bracket mounting plate, bottle accessories, Cheater solenoids, nitrous fittings and adapters, and dry gauges.
Win a Complete Turbo-Ready LSX Engine Worth More Than $12,000| 05/16/2018
It's 376 cubic-inch (6.2L) Gen IV with nothing but the finest components.