Base Boxster performance progression

[BYprodriver]

Danks sport muffler is about 15 lbs lighter & zero drone.
Secondary cat delete pipes about 15 lbs lighter, & 3 HP gain. Exhaust louder no drone.
Underdrive crank pulley 5HP & slows power steering pump speed increasing reliability.
Maybe the best thing you can do is use Gold Foil to wrap intake components & reduce intake air temps.

[56 Spider]

Thanks for the suggestions. I have heard good things about the Dansk mufflers before, so I will check out some pricing on these.