I want to replace my injectors with new ones I may have a leaky or weak injector, what brand is best and I have seen some that say 40 more hp! If I can I would like to up grade!
If you guys can provide a link.
Thanks
1991 F250 7.3 idi 1750,000 miles

 

Never heard of a upgrade or horsepower upgrade. Are you sure you are not looking at the stroke injectors.
It seems the delphis are the most popular, I think it is because of price and availability.
I do belive there is some benifits to buying them from a source that pop tests and matches them over run of the mill internet sales. Typefour on here handles them as well as others, I think oregon injection is another one.