i just bought a walbro255 fuel pump i wanted to install it but i wanted to know if i do will my car still run right no problems? i am going to get tuned next month with 440cc injectors but if i just do my pump alone right now just to say i did it will i be ok?

 

You will be fine running that pump on a stock engine

 

Yup the bigger pump will not cause any issues, just more flow back through the return hose.