Europipe Exhaust Stage 2 installed Porsche 911/997 turbo - vacuum sound gone

Europipe exhaust stage 2 installation on my 997 turbo, did some stock vs Europipe sound comparisons, Make sure Not to break the studs or you will have a very bad day/week! I followed the bumper removal guide from TheRock88 - https://www.6speedonline.com/forums/9... Parts used: 997 111 217 70 Steel gasket (exhaust catalytic) 999 084 203 01 x 8 Lock nuts 900 081 059 01 x 8 studs exhaust High temp anti seize for O2 sensors and studs/bolts stubby 13mm open end wrench consider replacing your O2 and Lambda sensor (I didn't, Lambda sensors are $$) Torch PB Blaster Misc tools Just a quick update, (5/1/20) with the Cobb stage 2 map and my relatively new stock clutch (less than 9k miles), it is starting to slip under heavy load or torque. Like if I were to drive 70mph at 4th or 5th gear and I floor it, it will slip. Going to have to upgrade the pressure plate to the Sachs 764 soon which has a higher clamping force.