Most car enthusiasts are familiar with the name ZR1, whether it's from the original run as a high-performance variant of the 1970-72 Corvette C3 or its continuation during the C4, C6, C7, and C8 Corvette generations. But far fewer enthusiasts know about the ZR1's much rarer sibling, the Corvette ZR2. This hardcore, big-block-powered package was offered only during the 1971 model year, and a total of just 12 Corvette ZR2s were ever built — ten coupes and two convertibles. Today, a surviving '71 Corvette ZR2 can sell for over a million dollars.
Photos courtesy of Mecum Auctions
The History of the 1971 Corvette ZR2
Above: This 1970 Corvette ZR1 was a purpose-built track weapon, but it still wasn't quite as extreme as the mighty ZR2.
Back in the early 1970s, there was a dark cloud looming on the horizon of the high-performance car market. Increasing emissions restrictions and oil crises would soon set back American muscle cars like nothing automakers had seen before, but in 1970, General Motors was unaware of the full severity of the situation. So, they continued to greenlight cars that pushed the performance envelope.
Regular Production Option (RPO) ZR1 was introduced in 1970 as a $968 option package that would continue through the end of 1972. It featured a solid-lifter 350ci LT-1 small block V8 (pictured above) that produced 370hp and 380 lb-ft of torque, paired with a heavy-duty Muncie "rock crusher" four-speed manual transmission. It also came with a high-capacity aluminum radiator, larger power-assisted brakes, heavy-duty springs and shocks, K66 transistorized ignition, and numerous deleted features (e.g. radio, A/C, and power steering) for weight reduction.
All these characteristics were designed for one purpose: to make the Corvette as fast as possible around a race track. It was never intended for the street, nor was it advertised as such. In fact, it was visually indistinguishable from a standard Corvette, without any special ZR1 badges or emblems.
As extreme as the ZR1 package was, GM offered an even wilder version for the 1971 model year. The 1971 Corvette ZR2 offered all the same track-ready modifications as the ZR1 — including the manual transmission, cooling and brake upgrades, and weight reduction — but replaced the 350ci small block with a monstrous 454ci big block V8.
Designated the LS-6, this 454 engine featured aluminum cylinder heads, solid lifters, and a four-barrel Holley carb on a free-flowing aluminum intake manifold. Officially, it was rated at 425 hp and 475 lb-ft of torque on premium fuel, but those numbers were allegedly significantly underrated. The real output was north of 460 horsepower, and some believe it was as high as 500.
Above: The 454 hood emblem was one of the only hints that this C3 was something special.
The ZR2 package was quite expensive for its time, adding $1,747 to the pricetag of a $5,496 car. That's more than 30% of the Corvette's MSRP for a single option!
Only 12 ZR2 Corvettes were ever built before the package was discontinued at the end of 1971. The ZR1 would make it one more year before meeting the same fate, with its total production number reaching just 53 across all three model years.
At auction, surviving Corvettes with the ZR2 package have sold for anywhere from $400,000 to $1,000,000. The convertible in these photos sold at a Mecum auction in 2023 for $785,0000. Only a handful of ZR2s are still known to exist, making this one of the rarest Corvettes of all time.
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