The RD2-90 Injection pump is the most popular, longest running pump at R&D. With Peak fueling at 110cc@1400rpm, and 90-95cc@2800 RPM, This pump is rated at 250whp/550wtq (With stage 1 injectors) through a manual transmission with an optimized setup. This power level is the best all around as far as price, performance, and reliability are concerned.
-Not Recommended for trucks without head studs (If you dont have head studs, run at your own risk)
-Stage 1 injectors recommended for max optimization.