hey guys, I was looking online and found this.... hope it helps some people trying to learn the lingo of the car talkers here!

Note: The following list is ordered from simple to complex methods depending on how far you want to go with your vehicles performance.

Air Filters

The first and fastest way to get more power out of any engine is to get more air into the engine and more exhaust out. A high-flowing, low restriction air filter setup is the way to start. Perfornace air filters are available for almost any application. Horsepower gains vary, but you can expect a 5-10 horsepower gain in most applications.

Exhaust Systems

The stock exhaust system found in most vehicles is a soruce of great flow restritcion. By replacing the exhaust system, you will discover a dramatic increase in power. The simple, and most popular method to gain some power is to install a cat-back exhaust system, which replaces the stock exhaust from the catalytic converter to the tailpipe. These systems incorporate a high-flow muffler and often use larger-than-stock diameter tubing, which is mandrel-bent to eliminate crimping when the tubes are bent. Several manufacturers produce cat-back exhaust systems specially made for each model.

There are a few important things to consider when choosing a system for your truck. The material used in a cat-back system is usually aluminized steel. Aluminized steel exhaust systems are cheaper, but they won't last as long as stainless steel. For maximum durability, and if you can afford it, choose a stainless steel exhaust.

Exhaust systems vary greatly in exhaust tone, in-car noise, and fit. Keep those things in mind when deciding on your exhaust system. Another consideration is the exit location of the exhaust. Several manufacturers offer rear or side exit systems. You may also have the choice between single or dual-exhaust outlets. If you plan on installing your own cat-back system, remeber that although the new exhaust may be a simple bolt-on operation, removal of your old system may require cutting.

If a cat-back system isn't available for your application, you can purchase a high-flow muffler and fabricate your own system using larger-than-stock tubing, or have your muffler shop build one for you. A good cat-back exhaust or high-flow muffler can add up to 15-20 horsepower to your engine, and may also help with fuel economy.

For a mild boost of power, start with a high-flow air filter and a cat-back exhaust system.

Computer Chip Upgrades

If your engine is controlled by a computer, chances are you can gain power and performance by installing a computer upgrade. Most vehicles can use a replacement PROM (Programmable Read Only Memory) chip. These chips can alter the air/fuel ratio, idle speed, and spark timing of your engine depending upon different operating conditions. Most changes occur at or near wide open throttle. Most chips sold by large manufacturers are made for stock or near-stock engines. Examples include ADS, Z Industries, Hypertech, and JET. If your engine has been heavily-modified, you will need a chip which has been programmed for your application, some chip manufacturers, such as Z Industries, allow you to specify parameters and can make custom chips, or change a chip's settings.

Some systems make changes easy, and they can control ignition timing, fuel injection performance, and even automatic transmission shifting points.

Computer chips and reprogrammers can add up to 20-30 horespower, especially if you have already added a cat-back exhaust system and performance air filter. Some chips and reprogramming units require the use of premium gasoline, which may be an important consideration if you want to keep your fuel costs down.

Underdrive Pullies

Underdrive pullies usually consist of crankshaft

 

so why is battery not up there..... [:'(]