Strokers are part of an after manufacture process that increases the size of a vehicle engine. This is often done by specialty machine shops with mechanical experts in the automotive trade. They can rebore and basically make an engine bigger and thus increase its capacity to take in fuel, burn better and other such qualities.
For the state of Washington, as in many if not all others, the specific engine is built from kits available in automotive shops. You can say that stroker engines Seattle WA are a well recognized part of the trade. They are often used to increase performance for machines that are going to take to the speedways, and you can hear the bigger engines breathing inside these.
The basic block found inside your vehicle is a standardized form of mechanical systems which are used by manufacturers on their products. Engines are actually versatile and great mechanics are able to recreate or remodel these to fit any need. The process involves a primary one that makes piston strokes that much longer.
This enables the car to have a bigger engine, which is not about size but about the capacity of an engine to take in fuel. The longer stroke provides this capacity, but the size is limited to the total size of the block. Beyond this or thereabouts, it becomes inefficient to remodel the block and could lead to its being useless after the stroker rebuilt.
Kits are complete, and it has all the piston types, the rebore drills and other tools and products to do the job fast. These are standard, too, because it has been found that the sizes need to be standard for the manufactured engines. This means these items are already finely shaped and sized, and you only need to fit these to your car.
The process is simplified but always some savvy handling and you should have the experts do it. You can watch the process or study online tutorials if you want to do the work later on. Or if you yourself want to become a stroker mechanic.
This expert works along the rarefied atmospheres of race car pit stops and speedway HQs. They are valued because the vehicles which may have had set ups from kits often need some close and reliable services for high performance jobs. Anything can be done up with these, but you need to study how they can fit or how the results can work.
Working this out is a matter of some match and some understanding of mechanical engineering. The injected fuel becomes larger in volume, requiring the same amount of air to burn, and thus the engine becomes bigger in terms of the mass it can handle. The process is one that also lets the entire block breathe more air, and so have more power, speed and torque.
These things actually become new products and the after manufacture is the only way this can be done. Work is usually done on manufactured vehicles and the apparatus for doing the work will not have other components for the body, the chassis or interior.