Editing Automobile engine replacement (section)

==Use==
Replacement engines are used to replace classic car engines that are in poor condition or broken, or to install a more powerful or more fuel efficient engine in a vehicle. Replacement engines are often used to make old cars more reliable for daily driving. Classic car hobbyists may also install reproductions of a rare powerplant in a classic car (this is most often seen in [[Mopar]] [[muscle cars]] that have the [[426 Hemi]] installed into them).

Aftermarket engines are used in many forms of [[motorsport]]. Some [[late model]] racecar series use "[[#Crate engine|crate engines]]" many of which are made by independent firms.<ref>{{cite web|last1=Huneycutt|first1=Jeff|title=Crate Late Model Setup - Crates On Dirt|work=MotorTrend |date=21 March 2011 |url=http://www.hotrod.com/how-to/chassis-suspension/ctrp-1105-crate-late-model-setup/|accessdate=January 3, 2015}}</ref> This ensures that drivers all have similarly powered racecars. [[Legends car racing|Legends]] and [[Allison Legacy Series]] cars also use sealed crate motors.