I have a stock 430 HP crate LS3 with 4000 miles on it. All new parts in the build including new gas tank and fuel pump. On the dyno, they noticed it losing fuel pressure at WOT (it’s fine just cruising). We replaced the fuel pressure regulator and determined the factory fuel lines and rail are sufficient. Going to replace fuel pump next but want to get the best quality possible so this doesn’t happen again. I see Walbro 255 as a popular choice but found this Deutschwerks DW200 that looks like good quality. What is recommended for best quality?

 

Will a stock LS3 pump fit in your tank? If it will, that's what I'd use.

 

Thanks for the help, sofakingdom! So I guess stock is AC Delco? It seems like Walbro might’ve been used as well.