I have an 01 L with the following mods and Dyno #'s. What gains could I really expect from ported intake, TB, etc.?

Also would a cat back offer me anything other than noise?

5lb JL Pulley
JDM Air Cleaner
Boost Actuator Adjustment
Boost Limiter Mod
LJ Chip

398.5hp 4700rpm
490ft lbs

12.89 at 107.5 w/2.02 60ft on worn F1's

 

whats your a/f? your running good just to have those things done. i think a single blade is worth it. how agressive is that chip?

 

I really don't know the A/F ratio and how agressive the chip is. JL reburned the chip when I got the pulley and I asked him a few months ago if he had a newer program and he said mine was still current. I run premium pum gas and never hear any detonation even when it is below 30 degrees.