How do I fit aftermarket sportier seats in my 2001 BMW 325i?

Ive noticed that most aftermarket seats are narrower that the stock seats. How do I fit new seats in the car?How do I fit aftermarket sportier seats in my 2001 BMW 325i?there are special fittings for these seats. you can find them from after market parts stores.How do I fit aftermarket sportier seats in my 2001 BMW 325i?Not really sure what you mean by fitting them in the car. Some models of seats are sold in multiple widths so you can get one that fits you. As for putting them physically in the car, well, that's what seat adapters are for. Post more information if you want a better answer that's more help.