by 
The Curious Bag
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A crate motor is an easy way to replace the old engine in a car or pickup track. There are numerous sources for crate motors.
Identification
A crate motor is an aftermarket car engine built up and ready to install. Crate motors are an alternative to obtaining an engine block and purchasing the parts separately to build up a motor.
History
Crate motors became popular when the major car companies--General Motors, Ford and Chrysler--started offering complete, performance engines through their parts supply chains.
Types
Crate motors are offered by the car manufacturers, aftermarket performance parts manufacturers and custom engine builders.
Effects
Crate motor programs provide ready-to-install engines backed by a warranty if something doesn't work. Buyers can purchase high-performance motors for racing or street use.
Considerations
GM, Ford and Chrysler provide cost-effective crate motors using their own, in-house performance parts. They provide excellent warranty support. Aftermarket engine suppliers can produce a higher level of performance by selecting the best performance parts available.
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