The 143* (03-04) spray angle actually sprays towards the radius of the wide bowl (late piston) design. The 124* spray is more in the center of the piston which creates more heat in the bowl which is one of the reasons they like to melt pistons. I'm running the 143* in my 06 and it runs very well. I have run up to 29* at 3500rpm with egts hitting 1950* at the 1/8 mile with no problems thus far. If your worried about spraying outside the bowl go with larger injectors, less duration means less timing.