LS6. Throttle Body: 78mm, 3-Bolt. Throttle Control: Drive By Wire. Fuel Injector Flow: 30 lbs. Fuel Injector Length (between O-Rings) 2.5 in. Fuel Injector Connector: EV1. PCM: Warren. Crankshaft Reluctor Ring: 24x. Camshaft Sensor: Rear Mount, 1x on cam. Oil Pan (Corvette) Bat Wing. Oil Pan (CTS-V) Rear Sump. Oil Pump: Standard Volume

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.

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 upgraded internals. Below are some upgrades that improve the performance of the LS1 and LS6 engines. Engine Block

The intake manifold will tell you whether the engine came from a truck or a car. The car manifold has a rounded top and you can see the contour of the intake runners. The truck manifold is about 3 in. taller and has more of a box shape.

These kits replace all the AFM components with standard parts. It also becomes easier to fit an LS6 intake manifold. The smooth, non-AFM valley cover won't interfere with underside of the manifold. Cylinder Heads. The cathedral port cylinder heads are based on the LS6 heads and make good power. You can mill them about 0.030 in. for more ...

Chevy LH8 Engine Specs; Chevy LH9 Engine Specs; Upgrading the LH6, LC9, LH8, and LH9 Engines; Benefits. These engines were some of the first Gen. 4 LS engines. The LH6 was released at the same time as the LS2 and is very closely related. All the engines in this family have the same 799 or 243 cathedral port heads that came on the Corvette's LS6 ...

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 . The LS2 was available in the Corvette and the CTS-V until 2007. It was also used in the GTO in 2005 and 2006. L76. The L76 was an adapted version of the LS2.

The high-output L33 used flat top pistons, full floating rods, and 2.000 in. intake valves. The cylinder heads are also closely related to the Corvette LS6/LS2. Below are some upgrades that improve the performance of the LM4 and L33 engines. Engine Block. The LM4 and L33 have small 3.780 in. bores.

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. Follow this link for help Identifying an LS Engine by Inspection. Click on the RPO code in the table to see more details about that engine.

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