General Motors' Vortec engine has powered some of the best cars GM ever made, but it's not without its problems. Which years ...

We've been getting a ton of mail with questions about how and when to modify the Vortec small-block iron heads—so much mail that we decided to condense all the Vortec information into one ...

It was called the Vortec design and became the most efficient mass-produced small-block Chevy cylinder head ever created. When Chevy enthusiasts discovered the capabilities of the Vortec head ...

GM's 706 Vortec heads are the cheapest and most effective heads you can use on your 4.8-liter and 5.3-liter, and even some 6.0-liter LS engine builds. Bold statement? Well, not really. You see ...

all of which were secured with a new 18-bolt head pattern. The engineers also decided to alter the firing order. Older GM big ...

Aluminum heads, stroker kits, camshafts, and intakes are among the bolt-on parts that will step up the Vortec 8100's game. With bolt-together kits available that send power as high as 685 ...

Dubbed Vortec 3700 (or LLR), its output rose to 242 hp and 242 lb-ft (328 Nm) of torque, but more importantly, the cylinder head problem that afflicted its predecessor was addressed with an ...

The Vortec 5.3L V8 LMG was an engine produced ... optimizing the flow path from the intake manifold into the cylinder heads, while the exhaust ports are also designed for greater flow.

At launch, the half-ton pickup was available with five powerplants, starting with a 4.3-liter Vortec V6 ... The fuel-injected engine with cast-iron heads is backed up by a column-shifting ...