Maybe use something universal that protrudes a little: https://androidautoshop.com/11-universal-1-2-din-stereo
Thus the bigger screen will cover the not so optimal fit and a bigger screen is always nice.

I have made a (crappy) video of what I feel and hear as a slight crunch (for me 1 -> 2)



So this is what Nissan considers "ok". If yours is more violent I'd certainly not accept it.

https://www.spritmonitor.de/en/overview/33-Nissan/1435-Pulsar.html?fueltype=2&vehicletype=1&constyear_s=2015&power_e=130&page=3&gearing=1&powerunit=2 6.84 l/100km average and 9.66 l/100km max recorded. Most do just around 7 l/100km it seems. So that plus mostly city driving s...

No that one doesn't fit the C13. Look where the vent control thingies are

Do you get crunching while quickly shifting from 6 -> 5 @ high rpm? That would point to a bad syncro, but that seems highly unlikely. If I had to take a guess about that video, I'd say there may be a problem with the shifter linkage (the cables etc.) or maybe a transmission/engine mount problem. The...

Is it a crunch like in this video?

Here is a user story for fitting a aftermarket radio into a Pulsar that supports the idea that it is nearly identical to a 2-DIN radio: https://www.foroclub.es/nissan-pulsar/v ... .php?t=624

I tried 3 -> 5 for you @ >4000rpm and that did not make crunching noises. It takes a a tiny bit longer to synchronize that kind of rev drop, obviously. I have to "feather" 1 -> 2, otherwise I get a little crunch sometimes. According to two independent Nissan dealers everything is completel...