Tire-Killing Capability with 550-650+ Horsepower!

The LS7 engine is a legend in its own time. With more than 500 horsepower from the factory, it delivers power that was reserved for race cars only a few years ago.

But as powerful as the LS7 is, we couldn't help but explore its capabilities. The result is Thomson Automotive's range of Ultimate LS7 performance engines. We start with a LS7 7.0-liter (427-cu-in) core and perform the following upgrades:

• Bore and hone the cylinders with torque plates
• Rebalance the rotating assembly
• Replace the factory cast pistons with stronger forged aluminum pistons
• Install custom, file-fit piston rings
• Install one of our custom-grind camshafts
• Add stronger valve springs and retainers to withstand the lift of the new cam
• Available in dry-sump or wet-sump configurations

Our most basic upgrade delivers about 550 horsepower, while our most radical cam enables 650 horsepower or more!

We also offer a number of component upgrades to suit your needs, as well as a variety of oil pan applications to fit your vehicle.

When it comes to engine assembly, Thomson's experienced engine builders meticulously measure and re-check tolerances and clearances to ensure the engines make big power reliably.

Ultimate LS7 engines start at $14,995. (No core exchange required.)

Thomson Automotive is a leader in high-performance LS engines. We've spent countless hours designing, building and dyno-testing street and strip engines, from production-based, normally aspirated engines to custom, forced-induction and nitrous engines. We know what works.

Give us a call and let us build an Ultimate LS7 performance engine for you!