what should i do next

[QTR]

i have a GMC sierra 03 5.3, 2 wheel drive and have all this installed.
in the 1/4 m 14.768's
long tube headers
catback
air filter
diablo
spark plug
wires
electric fans
Transmission Cooler
anybody know what should i do next?

 

[94Z71stepside]

Bigger injectors and map programming.rear end Gear ratio swap perhaps. Bigger number equals hater acceleration.

 

[QTR]

thank you for replying
what brand do you recommend regard the injectors .
yesterday i went to drag and i saw a 2500 diesel truck lifted it had 12.700's i was shocked

 

[Prone17]

Buggy Whip