FlowTech Exhaust Exhaust Flange
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FlowTech Exhaust: Performance Without Compromise
FlowTech Performance Exhaust was founded in 1994 by exhaust market expert Gary Biggs with a straightforward mission: deliver high-quality performance exhaust products at a price enthusiasts could actually afford. In less than two decades, that mission translated into market leadership, with FlowTech becoming widely recognized as the go-to brand for value-priced performance exhaust systems. In 1999, FlowTech joined the Holley Performance Products family, expanding its reach while staying true to its roots in delivering real-world power and sound gains without the premium price tag.
Engineering That Makes a Difference
FlowTech built its reputation not just on competitive pricing, but on genuinely clever engineering. The brand introduced practical installation improvements that serious builders appreciate — slotted port flanges to give extra wiggle room when fitting exhaust headers, dimpled tubes at the port for easier header bolt access, and parallel-ground flanges that ensure a tight, leak-free seal. These aren't cosmetic upgrades; they are the kind of thoughtful details that make a Sunday afternoon install go smoothly instead of turning into a knuckle-busting ordeal.
Among FlowTech's most celebrated innovations are the Afterburner™ headers, which use a unique velocity tube to separate odd-firing cylinders and improve exhaust scavenging — translating to measurable gains in horsepower and throttle response. Equally iconic is the patented Warlock™ bypass muffler, which earned the SEMA Best New Product Award in 1996 for its revolutionary open-or-closed design. Whether you're building a weekend track car or a street-driven muscle machine, FlowTech mufflers let you dial in exactly the sound profile you want.
A Full Exhaust Solution for Cars and Trucks
FlowTech's product range spans the entire exhaust system. Their exhaust system kits — including cat-back and turbo-back configurations as well as universal X-pipe kits — make it straightforward to upgrade an entire system in one shot. For those doing custom builds or replacing worn components, exhaust header pipes and collector pieces are available to bridge the gap between headers and the rest of the system. FlowTech also stocks the hardware side of the equation: exhaust header gaskets are available to ensure a proper, leak-free seal at every joint — an often-overlooked detail that can make or break a performance exhaust installation.
Coverage spans a wide swath of popular applications, from classic GM muscle cars and Camaros to late-model Mustangs, full-size trucks, and even diesel pickups. Available finishes include standard painted steel, aluminized steel for corrosion resistance, and show-quality ceramic coatings for builds where underhood aesthetics matter as much as performance. Whatever your platform, FlowTech delivers the aggressive sound and measurable power gains that performance enthusiasts expect — without requiring a second mortgage to get there.
Why Choose FlowTech?
- Founded in 1994 with a core mission of performance and value
- Part of the Holley Performance Products family since 1999
- Patented innovations including the SEMA Award-winning Warlock™ bypass muffler
- Iconic product lines: Afterburner™, Raptor™, Terminator™, Warlock™, and Purple Hornies™
- Wide application coverage from classic muscle cars to modern diesel trucks
- Multiple finish options: painted, aluminized, and ceramic-coated