This 756-HP Cadillac ATS-V Is a Six-Speed Manual Monster

I’ll be honest with you: I have a real weakness for four-door sleepers that can humble muscle cars, and this heavily modified 2018 Cadillac ATS-V made me do a double take. In factory trim, the ATS-V’s 3.6-liter twin-turbo V6 was no slouch, cranking out 464 horsepower and 445 lb-ft of torque and launching the little luxury sedan to 60 mph in roughly four seconds. But this car isn’t stock. Not even close. It now puts down 756 hp and 800 lb-ft of twist, which is the kind of number that makes a Hellcat owner check the rearview mirror. That, my friends, is absolutely bananas.

Honestly, the ATS-V never got the love it deserved when it was new. It was sharper than a lot of the German stuff at the time, and the twin-turbo V6 had plenty of punch. But 464 hp from the factory was just the appetizer. This owner decided to skip the main course and go straight to dessert. To nearly double the output without turning the engine into glitter, the seller went bananas with the parts list. We’re talking fresh turbochargers, an upgraded throttle body, an aftermarket fuel system, and methanol injection just to keep the party lit. The cylinder heads are held down with upgraded studs, the intercooler is new, and there are fresh camshafts and valve springs in there too. The clutch got swapped for something that can actually handle all that torque, which is a must because this ATS-V still rocks the six-speed manual. Three pedals, baby. In 2026, that alone is a unicorn spec.

Here’s a quick look at how the numbers stack up:

Spec
Stock
Modified

Horsepower
464 hp
756 hp

Torque
445 lb-ft
800 lb-ft

Transmission
6-speed manual
6-speed manual with upgraded clutch
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