These "V2" 12AN fuel rails incorporate enhanced injector angles for better part throttle drivability and top end horsepower when combined with your V2 Trinity intake manifold. FOR VERSION 2 TRINITY INTAKE MANIFOLDS ONLY, WHICH ARE THE FOLLOWING PART NUMBERS: TRA-1-BLK-P105 TRA-1-P105 TRA-3-BLK-P105-V2 TRA-3-P105-V2 TRA-7-BLK-P105-V2 TRA-7-P105-V2 TRA-LTTK-INJ-BLK TRA-LTTK-INJ FITTINGS NOT INCLUDED!