I have an extra bypass, you could try and use the plastic one for now (discharge) like The Bone said. As far as injectors, I went with 60lbers and had 42lbers already but I wanted so room to grow plus the price was right at the time. 39/42 lbers will support alot of power though and you might be fine with those. Alot of guys make 500ish at the wheels with them.