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Preview the sound before you put out the cash. Dynomax performance exhaust systems have sound bytes that you can download for some of their systems on Firebirds, Mustangs and Civics with a Vtec engine. Log on to the A-1 Performance website to get an earful.

Cruise the local shows for ideas. Nothing compares to hearing an exhaust system in person, so scope out the sights and most importantly, the sounds, at the local car cruise. Youll get ideas of what works best on your make and model.

Choose your sound. Decide if you want the classic V-8 rumble or a more toned-down sound. A great choice in either case is one of the Flowmaster exhaust systems. You can trust their 22 years of experience in the muffler business and they have an exhaust for every type of sound youre looking for.

Decide whether you want a dual exhaust or single exhaust system. Keep in mind that some dual exhaust systems dont perform properly because they are designed only for looks. To ensure a great dual exhaust sound, be sure to choose a system like the Flowmaster.

Keep performance a priority. The exhaust systems note is important, but dont sacrifice performance for sound. Be sure your exhaust system matches your engine manifold and is fitted correctly down your undercarriage, or else you may be looking at decreased engine performance.

Determine the surface of your vehicle that you wish to caulk. Glass, metal, plastic and rubber surfaces all have different caulking needs.

Use a silicone or siliconized acrylic caulk, one labeled for adhesion to glass, if you are caulking windows, a windshield or another glass surface. Brands of silicone caulk include GE Silicone and McKanica Silicone Caulk Remover Gel.

Use a butyl rubber caulk when sealing an unpainted metal surface. This is a good option for surfaces under the hood of your car. Brands include Dap Butyl-Flex Gutter and Flashing Caulk and Red Devil Butyl Rubber Sealant.

Use a siliconized acrylic-latex to seal gaps between plastic surfaces. Herchem Plumbers Caulk is an option for this purpose.

Use a silicone sealant for rubber surfaces, as well. Rubber surfaces in your vehicle can include hoses, weather stripping and other trim. An applicable brand is Work Zone 100 percent Silicone Sealant.