If you want a lot more usable torque then you should get rid of your heavy stock x-pipe and swap for a titanium catless unit. Should run around $1,500 installed. Car will be lighter by ~ 50 lbs and you will gain 20-30 lb ft of torque throughout the entire rev range.
Daily #1: 2016 i8 Chrystal White w/BMW iBlue / Tera World
Daily #2: 2015 991 Turbo S White with Gloss Black Aerokit / GIAC
Track/Airstrip: 2011 997.2 Turbo S PDK / GIAC FBO / GMG suspension build
Beaterz: 2013 X5 3.5 Sport, 2015 Wrangler Unlimited
IG: longboarder949; YouTube: https://www.youtube.com/channel/UCT1...eoFBszPIK0gf9w