Saved I believe 75 pounds with factory active exhaust. Agreed it is not easy to achieve this unless you remove weight and race in close to Negative DA.
2019 pp1 401A. Drag pack, light weight 2 piece front rotors,E85 tune,170 thermostat,air filter removed, passenger,rear seats, exhaust removed,light weight battery. Stock air box,stock exhaust manifolds and cats. DA was close to negative.
I would assume the caliper will rub the rim. You can grind down the caliper a few mm to fit. If you really want them that bad. I did with my Brembo to fit 17 inch rims I already had.
https://www.mustang6g.com/forums/threads/budget-drag-wheel-and-tire-setup-check-this-out.97726/
Is there a noticable feel in power with longtubes? In my case I am more concerned with power than sound for the amount of money and labour involved can't justify if it's not noticeable.
Congrats on getting into the 10s. This was done with factory exhaust manifolds and cats. Makes me question if the gains are worth it for the cost and installation of longtube headers.
Might just need to switch to a tuner that uses HP tuners. The livernois tuner may not be on the same level as HP tuners in the amount of adjustable parameters.