Anyone know what 01 cobra manifolds and injectors are good for? I dont want to spend the money if there is no significant gain there yet.

 

01 cobra manifolds are amongst the ones used for turbo set ups. that should tell you allot

 

not sure what it is you have done to it or how much power it is making but there is an equation to figure out what power your injectors are good till and what type of injectors you will need for your power level. for a set of 24# injectors (what comes stock on cobras) the equation will look like this. (24 x 8 x .85)/.50 = 258.4 so 258 brake horse power @ 85% duty cycle (thats horsepower at the crank). the 8 in the equation is the number of cylinders, the .85 is because you dont want more than 85% duty cycle on the injectors, and you divide it by .50 because that is the BSFC (Brake Specific Fuel Consumption) on our cars. if you have FI, depending on boost, it will be .55 to .65 BSFC.
as for the manifolds not really sure what you mean but these engines really benefit from a short runner intake such as the FR500 Variable Geometry intake or Sullivan intake.

hope this helps out some.