Hennessey Performance‘s new tuning package for the McLaren 600LT makes for an ambitious build.

McLaren’s 600LT rolls off the factory floor with 592 horsepower and 457 pound-feet of torque. The twin-turbocharged 3.8-liter V8  and an ultra-lightweight carbon-fiber tub are a potent combo. Without any adjustments from Hennessey, the supercar already produces plenty of seat-of-your-pants driver engagement. The long tail McLaren is regarded as one of the more exciting driving options in its price range.

So it’s safe to say that the tuner started with a pretty powerful foundation. From there, the Texas-based tuner offers three upgrade package options. Customers who opt for the HPE 700 package will enjoy 708 hp and 635 lb-ft of torque thanks to new high-flow air filters, a stainless steel exhaust, and an ECU tune.

Not substantial enough? Well, drivers with a bit more cash to throw around can elect the tuner’s mid-range option, the HPE 800, which increases power to 805 hp and 722 lb-ft of torque.

To give your McLaren 600LT the full, four-figure horsepower treatment, you’ll have to scrape up an additional $100K. The HPE 1000 includes new twin turbochargers, stainless steel exhaust manifolds, a transmission update, and an aftermarket Motec ECU. All of these upgrades culminate in a power boost to 1,001 hp and 865 lb-ft of torque. Which will propel your 600LT from zero to 60 mph in a heart-stopping 2.1 seconds.

HPE packages start at about $18K.