What are some of you guys getting in the 1/4 mile with the following done to your P10's: (similiar to the set up I have)

1. $Tillen/K&N intake (or similiar intake setup)
2. bumped timing 17 degrees (or 19 degrees)

That's it!

Then what times are you getting with above items and aftermarket cat-back exhaust.

Then what times are you getting with above items, cat-back exhaust and headers.

Just trying to get estimated times since I do not have access to a dyno nor the desire to spend the $$ on the dyno at this time.