The $17-a-Day Race Car: Inside the 1966 Shelby GT350H

This 1966 Shelby GT350H was born from an unlikely deal between Hertz and Shelby American — rent a genuine race-bred Mustang for $17 a day, then return it with a roll bar welded in if you were one of the many weekend racers who couldn’t resist. Read on to find out how a rental-counter experiment became one of Shelby’s most collectible cars.

Classic black 1966 Shelby GT350H parked indoors under an American flag.

Imagine walking into a rental counter in 1966 and driving off in a genuine Shelby-built race car for seventeen bucks a day. It sounds like a joke, but it actually happened, and the cars that came out of that arrangement have become some of the most legendary Mustangs Shelby American ever built. Hertz expected a modest niche product when they signed the deal. What they got instead was a cultural phenomenon that outgrew every projection they made — and a car that weekend racers famously returned with roll bars welded in and the badges swapped for cheaper parts.

From 100 Cars to 1,000: A Rental Program Gone Right

Hertz and Shelby American launched the GT350H — the “H” for Hertz — in September 1965, offering it through the company’s Sports Car Club to members in over 60 cities for $17 a day plus 17 cents a mile. Shelby initially expected to build somewhere in the 100-200 unit range. Demand blew past that estimate so thoroughly that the final tally for 1966 came in at a full 1,000 cars, a number nobody involved saw coming when the program started.

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Not Every ‘Rent-a-Racer’ Wore the Same Colors

The popular image of the GT350H is Raven Black with gold LeMans stripes, and that combination does account for roughly 75% of the run — but Wimbledon White, Candy Apple Red, Ivy Green, and Sapphire Blue cars all left the factory too, distinguished mainly by their Hertz wheel caps and a dash warning label rather than any mechanical difference. Every GT350H carried the K-code 289 High-Performance V8 good for 306 horsepower and 329 lb-ft, enough for a 6.6-second 0-60 run and a 15.2-second quarter mile — genuinely quick numbers for a car you could rent at an airport counter.

The Folklore Behind the Rental Fleet

The stories around these cars are half the reason they’re legendary: weekend racers reportedly rented GT350Hs specifically to compete in SCCA events, sometimes returning them with roll bars welded into the chassis, cheaper brake pads swapped in to replace worn-out originals, and the occasional badge or trim piece missing entirely. Whether every version of that folklore is exactly accurate or not, Hertz clearly noticed enough abuse that later rental agreements tightened considerably compared to the free-wheeling early days of the program.

A Program That Civilized the GT350

The Hertz deal’s runaway popularity ended up shaping the regular retail GT350 in ways Shelby hadn’t originally planned. Because so many everyday renters — not dedicated racers — were driving GT350Hs, Shelby American began softening the platform for 1966: an available automatic transmission, a more compliant suspension tune, and a fold-down rear seat option all showed up specifically to make the car livable for a broader audience than the raw, race-ready 1965 original had targeted.

Most Wore Automatics — On Purpose

Most of the fleet came with automatics since Hertz wanted something the average renter could handle without stalling it at a stoplight, which makes a documented 4-speed GT350H an especially prized find today. That transmission split wasn’t an accident; it directly reflected who Hertz expected to actually be driving these cars day to day, even as SCCA racers found their own workarounds to campaign them competitively on weekends.

Behind the GT350’s Racing Roots

The GT350 that formed the basis for the Hertz cars had been developed specifically to homologate the Mustang for SCCA B-Production racing, which meant every GT350H inherited genuine competition-bred underpinnings — upgraded suspension geometry, quicker steering, and chassis stiffening not found on a standard Mustang — even in its softened, automatic-equipped rental form. That racing pedigree is a big part of why weekend club racers gravitated toward the Hertz fleet in the first place: a rental counter was, improbably, the cheapest legal way to get behind the wheel of genuine SCCA-grade hardware.

Built by a Small Shop in Venice

All of this came out of Shelby American’s operation in Venice, California, a genuinely small outfit compared to Ford’s mass-production plants, which makes the sheer scale of the 1,000-unit Hertz order all the more remarkable. Shelby’s team was essentially hand-finishing race-bred Mustangs fast enough to keep up with rental-counter demand across more than 60 cities nationwide — a logistical achievement that gets less attention than the cars’ performance numbers but was just as critical to the program’s success. Coordinating parts, paint, and delivery schedules across a fleet spread coast to coast, all while continuing to build regular retail GT350s alongside the Hertz order, stretched Shelby American’s small staff about as far as it could go.

How the Program Ended

The Hertz rental partnership wound down after the huge 1966 production run, with only a much smaller number of GT350H cars built under a scaled-back arrangement for later model years before the collaboration effectively wound down entirely, making the original full 1966 program the definitive, most celebrated, and most collectible chapter of Shelby’s entire Hertz partnership. By the time it wound down, the GT350H had already done more to build the Shelby Mustang legend among everyday drivers than any dealership brochure could have managed on its own.

From Rental Fleet to Six-Figure Icon

Clean survivors now regularly clear six figures at auction, a wild outcome for a car that started life as a glorified rental. What began as a marketing experiment between two companies that barely expected it to work has become one of the most collectible chapters in Shelby’s entire history — proof that sometimes the strangest business arrangements produce the most enduring cars. Every GT350H that survives today carries that unlikely origin story as part of its value, right alongside the numbers on its build sheet, and that story only gets more remarkable to tell the further removed we get from a time when renting a genuine competition-bred race car was a legitimate, everyday option at an airport rental counter, no reservation surcharge or fine print required beyond seventeen dollars, seventeen cents a mile, a valid driver’s license, and a willingness to bring the car back in one piece.

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