Win a 690-HP 2017 Corvette Z06 3LZ + $15,000 Cash

What you're looking at

A 2017 Corvette Z06 3LZ coupe — the top equipment tier of the C7 Z06 — with 43,000 miles, one owner and a clean title. Under the hood sits the LT4: 6.2 supercharged liters and 650 hp in factory trim, which at the time was the most powerful engine GM had ever put in a production car.

The modification list is refreshingly sane. Kooks long-tube headers, a Griptec 2.30-inch upper pulley, an upgraded heat exchanger, a Corsa intake and a custom ECU tune bring it to roughly 690 hp by the shop's accounting. That reads like a modest gain on paper, but the pulley is doing the real work — a smaller upper spins the blower faster and raises boost, and the headers give the LT4 somewhere to put it. The heat exchanger is the smartest item on the list, and we'll get to why.

Transmission is the 8L90 eight-speed automatic. It's fast, and in a Z06 it is genuinely the quicker way down a drag strip — just know that the seven-speed manual cars are the ones the resale market pays extra for.

Why it matters

The C7 is the last front-engine Corvette and the last supercharged Z06. With the C8 the badge moved behind the driver and switched to a naturally aspirated flat-plane-crank V8, which turns this generation into a bookend. The market has begun treating it accordingly.

It also arrived with a reputation. Early C7 Z06s became notorious for heat soak: run one hard on a warm day and supercharger inlet temperatures climb, the ECU pulls timing, and 650 hp quietly becomes rather less than that. The aftermarket built a small industry around bigger heat exchangers in response — which is precisely what this car has. Anyone shopping a modified Z06 should want that box ticked before anything else, and here it is.

The honest caveat: 43,000 miles is real use, and boost-adders plus long tubes ask more of the bottom end, the blower and the eight-speed than GM intended. None of that is disqualifying — it just means service history, tune quality and how the first owner treated it matter more than the horsepower figure does. Long-tube headers can also raise emissions-inspection questions depending on your state and on whether catalysts were retained, which the listing doesn't specify.

The fine print worth knowing

Willertime lists the Grand Prize as the Corvette plus $15,000 cash at an approximate retail value of $75,000 — meaning the cash is inside that number, not stacked on top of it. The $15,000 is the useful part regardless: a prize package this size generates a real federal and state tax bill in the year you win, and $15k covers a meaningful chunk of it. Assume you will still owe something.

Entries close at 11:59:59 p.m. EST on September 7, 2026. Paid entries come from the shop at one entry per whole dollar spent on anything in the store, with no minimum purchase and periodic bonus multipliers — the current promotion advertises 20X and runs through September 3.

The free route is real and unusually generous. A hand-printed 3x5 card mailed in is worth fifty entries — the same as spending $50 — the rules apply the same bonus multipliers to mailed entries as to purchases, and the mail window actually runs past the paid one, with cards postmarked by September 8 and received by September 12. The exact wording, including the mailing address, is reproduced in the free-entry section of this listing. The sweepstakes is administered by ViralSweep LLC, an independent third party, and Willertime's previous giveaway — a 1988 Mustang GT plus $10,000 — has a winner posted on its site with a photo and a delivered status.