I'm wanting to start racing. I want some advice on how to get more horse power and torque out of my 96 XJ Sport. So far all i've got is headers, nitrous, bored out TB and turbo (5lbs of boost). What else would be good to have?

 

on stock injectors???

 

dont know much about racing but the i6 block has been pretty standard for a mad long time. an old family friend used to race them and you can swap out a lot of parts (some machining here and there) to put heads from an older amc 4.2, and swapping cranks, cams and pistons from various years to get max comp ratio. but he used motor in a stock car body. plus this was like 20 years ago. so idk about newer all fuel injected, but im sure you can get aftermarket crank/pistons for hp boost