Edelbrock Pro Flo 4 XT EFI System Seq Port LS Gen III/IV Cathedral Port 550 HP Max 35lb/hrThe Edelbrock part #35730 Pro Flo 4 XT Sequential Port EFI System for Chevrolet LS GEN III IV engines is equipped with the latest in technology and features. The EFI system comes complete with a Pro Flo XT cathedral port satin finish intake manifold and 35 Lb Hr injectors capable of 550 HP with 58 p. s. i. fuel pressure. The new Pro Flo 4 EFI systems feature an all new ECU with a faster processor, a water proof design and measures half the depth of