Thanks to the addition of an aftermarket supercharger, this 2013 Corvette Grand Sport can now run with the big boys, aka the C6 ZR1.
After its original 6.2-liter LS3 V8 was modified with a Paxton NOVI 1500 supercharger, this Corvette was dyno-tested at 617 horsepower and 576 lb-ft of torque – up considerably from the stock 436 horsepower and 425 lb-ft of torque and not far from the ZR1’s 638 horsepower and 604 lb-ft.
But now the owner’s looking for a new home for his modified Grand Sport and is offering it on Bring a Trailer, where the current bid is $25,750 with five days left in the auction.
This black over Ebony beauty has been driven just 12,000 miles and looks to be in immaculate condition, based on a look at the 100+ photos with the listing.
Besides the added supercharger, it also now features PFADT headers, an AlkyControl methanol injection kit, a Mighty Mouse oil catch can, and a Corsa cat-back exhaust system, along with a PLX Devices Multi Gauge that has been installed to the left of the steering wheel. The removed components will be included with the sale should a new owner wish to go back to the stock configuration.
Other features include a CD stereo, side airbags, Keyless Access, cruise control, aftermarket Grand Sport-branded floor mats, a Corvette-branded trunk liner, a black shifter, and dual-zone automatic climate control.
With ZR1 prices so high these days, this modified Grand Sport offers similar performance at a much more affordable price.
Source:
Bring a Trailer
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![[VIDEO] SOLD! 1963 Corvette Grand Sport Chassis 003 Sells for $17.7 Million at RM Sotheby's Monterey Auction](https://www.corvetteblogger.com/images/content/uploads/2026/08/081526_4-218x150.jpg "[VIDEO] SOLD! 1963 Corvette Grand Sport Chassis 003 Sells for $18.7 Million at RM Sotheby’s Monterey Auction")
Super nice!!!
Non modified GS probably worth $10,000 more and would sell faster.
Yeah, I have a modified vette also. I’ll spend my $$ however I feel. Don’t give a fu@k what someone opinion is if I should or shouldn’t do with my vehicle. I’m out having fun with what I have. I may or may not take a $10k hit. I had a blast when it was mine!!
This vette is awesome! Tasty mods, professionally done and tuned. Low miles, great color, and well maintained. GLWTA!
Hey Milo – folks like us who mod our cars don’t give two f*cks about the value. My Cyber Grey 2013 GS 3LT 6-speed manual, red calipers, black rims, two tops, with 11K miles on the clock has H/C/I headers, CAI, CHE trunion kit, hardened push rods, Cloyes timing chain, LS2 timing chain guides, ATI balancer, MGW, Corsa carbon fiber intake, MM catch can, painted fuel rail covers…basically a show car that makes 521rwhp. It’s ROCK solid, pulls to 6800 and still gets 27mph on the freeway. The chop at idle is music to my ears. I built it to be the car I WANTED it to be (stayed away from the time-bomb LS7). And I guaranfuckintee you, if I was to offer it up for sale, it would get MORE than an unmodified GS would command.
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