Toyota After market PartsToyota after market parts This article will describe permissible Toyota after market parts and then further explain how they can meet state requirements. The Original Match Requirement In general, most Toyota after market parts have to match the original parts that they're replacing. Air cleaners, carburetors, cams, computer chips, electronic ignitions, distributors, and transmissions are example parts which must match the original parts that they're replacing for legal use. A catalytic converter however must also be must ARB approved for the year, make, model, and engine size of the car that will use it. When Replacements Don't Match Their Originals When it comes to replacing heads on non-catalyst vehicles, heads need only to accompany the original smog controls found on stock exhaust manifolds. And the material of a replacement manifold can differ from its original manifold -- but its casting design must match. Oversized replacement pistons, rods, or cranks on the other hand don't have to match the design of their originals if they're within factory tolerances. Engines Depending on what's being replaced, an engine can become an engine replacement or an engine change -- and different rules apply to each. An engine that matches its original is considered a replacement. If it doesn't match its original, it's considered an engine change. Motors in engine changes have to match the year of the vehicle its entering and it must be appropriate for the car. Installing an engine for a heavy-duty truck into a passenger car is illegal and although these regulations appear extremely restrictive, they exist for a very good reason. Toyota After Market Parts Regulation Every single regulation is designed to protect air quality. In the state of California alone, more than 50% of smog pollutants are the result of emissions and by enforcing these rules, we help reduce the effects of these pollutants. We understand that many of our readers don't live in California but these rules will soon become standard everywhere as long as we continue to face our growing pollution problem. Pollution isn't a state problem -- it's a national problem that we're working to correct. As a result, The Federal Clean Air Act prohibits modifications that have been shown to increase motor vehicle emissions, and that's a regulation that crosses state lines.
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