TowRig.com - Diesel Discussion and Tow Tech

I am going to go with a custom tune from SCT. How many miles should I put on the new truck before tuning it. I already installed a 4' down pipe with full 4' piping w/o muffler and cat to the rear. Loves the way it whisltes when towing.

It really shouldnt matter from what I understand

The tuner that I use and do side work for recommends a few thousand miles to make sure everything is OK from the factory.