Hot Rod

We Test Three Different LS3 Intake Manifolds for Performance

One of the easiest ways to tune an engine's performance is with the intake manifold. Yes, the camshaft can have a bigger role in horsepower production, but a camshaft swap includes real work and more ...
GM Authority

GM Gen. 5 Small Block Deep Dive Part II: The LT1 Valvetrain, Intake, Exhaust And Cylinder Heads

For Part I, covering the new combustion system, direct injection, and active fuel management: click here. For Part III, covering the block, crankshaft and lubrication systems: click here. Continuing ...
Hot Rod

First Look: Performance Design’s XS Intake Manifold for LS3 V-8

A stock LS3 rec-port intake manifold is hard to beat and only costs $299. When Chevy went back to the drawing board after the success of the cathedral-port Gen III LS1 small-block V-8, it realized ...
Motor Trend

Inside the LS3: An illustrated look at the engine that powers the 2008 Chevrolet Corvette

The immortal Chevy small block has been extensively revised. Again. In this latest LS3 iteration, a 0.06-inch increase in bore bumps displacement from the LS2's 6.0 to 6.2 liters. But it took way more ...
Motor Trend

LS Engine Tips: Gen III vs. Gen IV

While some Gen IV engines do use cathedral port cylinder heads, pretty much all are of the later, LS6 design. By 2009, cathedral port use was mostly restricted to just the 5.3L engines while all but ...