How to install peg perego car seat adapter with the city select

Being different manufacturers, it is very unlikely an adapter is available. Think Toyota engine parts being used on a Nissan.

It's hard to describe with words. I would suggest you to watch video reviews on how you can attach your car seat. Also you can get help from your manual book which you got while purchasing the stroller. Hope that will help. Visit here for more: Best Twin Pram For The Money in 2017 Tested and Reviewed

Peg Perego car seat is only compatible with peg perego strollers.
It is not clear from your very laconic question what you really need.

If you need to install a peg perego car seat on a peg perego stroller, then just look into the manual, OR, if you don't have one, search for it online.
In case you need to install a peg perego car seat onto any other stroller, I doubt a lot, it is possbile...
I am in an opposite situation.
I have got a peg perego stroller, but another type of the infant seat. After long searched online, we understood that once you buy a stroller, you almost always have to buy a car seat from the same company, or you won't be able to use it as a travel system (which is exactly how we are going to deal with the situation)

You have to put the big bar through the wholes in the side attachments first before attaching the spring loaded bar. The big bar should be facing toward the front of the stroller.

Once the bars are all attached, the to clicky slots on the Peg should click into the small cross bar and the spring loaded bar. The big slot on near the back of the Peg should rest on the big bar.

Recline the stroller flat,under the seat pad there should be 2 pegs that pull out the carseat will click on these,good luck.

You cannot use a Peg Perego Infant Seat without the base. There is no belt path on the seat itself.

You will find the instruction manual online at http://babycare.manualsonline.com/manuals/mfg/pegperego/pegperego_primo_viaggio_car_seat_ece_r4403.html

It releases from the chassis the same way it releases from the base in the car. You may have to hold down on the stroller chassis with your foot while pulling up on the lever on the back of the car seat.

Contact Peg Perego & they will give you answers over the phone or send you a manual for free (email or snail mail).

800-671-1701