If you’re looking to squeeze some serious power out of your LT4 engine, the Stage 1 Pulley Kit is where it’s at. This kit can push your ride to over 700 horsepower and 700 lb-ft of torque at the flywheel, but only if you pair it with the right tuning. I’ve seen it work wonders on both Corvettes and Camaros, and trust me, it’s a game changer.
What’s great is that you won’t need to mess with your exhaust or fuel system to make this happen. Just a proper ECM re-calibration—though that’s not included in the kit—and you’re good to go. It’s pretty straightforward, which is a relief if you’ve ever had to dive deep into modifications that require a ton of extra parts.
Now, let’s talk about what’s in the box. You’re getting an ATI LT1/LT4 dry sump torsional vibration damper, which is a solid piece of engineering. The 15% overdrive balancer pulley is going to help you get that extra boost, and the Green Back HD Supercharger belt is built to handle the demands of increased power. Plus, you’ll find a 100mm idler kit and a crankshaft bolt in there too. Everything you need is included, so you won’t be scrambling to find extra hardware.
Just a heads up, when you install this kit, you can expect your boost to rise by about 2.5 to 3 psi. And don’t worry about drivability; with the right tuning, it should feel just like your stock setup, but with a lot more kick. It’s a straightforward upgrade that can really transform your driving experience.
As for fitment, this kit is perfect for the Chevrolet Corvette Z06 from 2014 to 2020 and the ZR1 from 2019 to 2020. If you’re ready to take your LT4 to the next level, this is a solid choice.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2014-2020 Chevrolet Corvette Z06 |
Corvette Z06 | 2014-2020 |
|
2019-2020 Chevrolet Corvette ZR1 |
Corvette ZR1 | 2019-2020 |

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