I have a set of injectors that were claimed to be upwards of 50lb injectors. They look like stock ones, but they also look like the msd ones which seem to be similar. They have a serial number written across the top but I tried searching that number with no luck. Any idea how to tell if they are stock or not?

 

You could scan the computer and it should tell you what size injectors it has. I have never heard of MSD injectors though.

 

Well originally I thought they were stock from the look and the guy was wrong, but someone posted some 50# in the classified section here today and he said they are 50#msd and mine look the same. This guy didn't remember exactly what size they were, he said 56# but I don't think msd makes that size...

BTW, these are not installed and I don't want to install them to find out how big they are, is there any other way?

 

You could contact Racetronix and see if they can match the number for you. Other than that, you could have them flow tested.