Views:Related Products:Engine Assemblies, Other Engines & Components

LS1 The LS1 is the original LS engine. It was first produced in 1997 for the new C5 Corvette. It was available in GM cars from 1997 to 2004. LS6 The LS6 is an improved version of the LS1. It was introduced in 2001 for the Z06 Corvette. The LS6 was available in the Corvette until 2004. It was also available in the 2004-05 Cadillac CTS-V. For specific details about these engines, please follow ...

On a stock engine, the following upgrades can improve performance and fuel economy: A Cold Air Intake Kit Headers An Aftermarket Exhaust A Computer Programmer A stock LS6 does have more power than a stock LS1. However, they can both make the same power with common upgrades. The aluminum blocks are not as strong as the iron block LQ4 and LQ9. But, they can be pushed to over 850 hp. with ...

Knowledge Base - Home SR-04891 Print I don't know the VIN. Which LS engine do I have? Views: Before you begin any project, you need to know the starting point. When it comes to Chevrolet's 3rd and 4th generation small blocks, there can be a lot of confusion. There are more than 40 variations of these engines.

Intake Manifold and Throttle Body The LS4 has a small 76mm throttle body. It also has a smaller intake manifold than other LS engines. The smaller units are needed to clear everything else under the hood. However, they restrict the engine's ability to breathe. It is possible to upgrade to a LS6-style intake with a larger 3-bolt throttle body.

LS2 The LS2 (VIN code U) replaced the LS1 in the Corvette in 2005. It used the new Gen. 4 block and the cathedral port heads from the LS6. The LS2 added more Displacement and better heads for more Horsepower and Torque .

All the engines in this family have the same 799 or 243 cathedral port heads that came on the Corvette's LS6 and LS2. The 5.3L engines have a smaller 3.780 in. cylinder bore.

On a stock engine, the following upgrades can improve performance and fuel economy: A Cold Air Intake Kit Headers An Aftermarket Exhaust A Computer Programmer The LM4 and L33 are as light as the LS1/LS6, but have thicker cylinder walls to handle boost and nitrous. 850 hp. can be supported with upgraded internals.

The following specs apply to RPO codes: LS1 LS6 LM4 L33 **Click the blue links in the table for more detailed information**

The information below applies to vehicles with the original engine still installed. If you have a second-hand vehicle that doesn't match the info below, the engine may have been swapped out.