I have a k.N intake and a skunk 2 exhaust I am getting a a spec header and cat delete will i run lean

 

You will run too lean with the cat delete trust me. And it will be so loud you wont be able to drive it around. I had the skunk2 exhaust and bought the t1r test pipe and had it on for 8 hours before removing it. I lost sooo much torque it was ridiculous. and the noise was way too loud. Now i am running the mugen header, t1r test pipe and midpipe, and hfp muffler (switched from the mugen dual axleback).

Dont have to worry about loss of torque anymore cause i'm running 10+ psi of boost.

 

did you have a wide band on it

 

i have run header, cat delete, and exhaust without running lean but i have read talk about here