Ok so I have a k and n cold air intake and looking towards getting an air raid throttle body space next wit a computer tune also for more performance also but recently my transmission went out so I'm gettin it rebuilt should I install a shift kit while its there or will da tune be enough

 

I would install the shift kit as long as its out.

 

I have never had one on mine, but I have heard throttle body spacers are worthless on these trucks.

 

I have one on mine With a k&n before the tbs I was getting 11.3mpg city after its getting around 12.5 city and I average 13.8mpg highway all the time sounds bad a** with the whistle under acceleration minimal power gains though I get more outta my k&n and cowl Hood

 

I got a spacer and the only thing I gained was the whistle that some mistake for a turbo, but sadly it is that one.