the dreaded exhaust question (again)

[Cloudsurfer]

Originally Posted by 2K3_Boxster_S

You can get 18hp if you do intake and full exhaust. see NHP exhaust thread.
Whether that's a minimal gain is dependent on what an individuals perception of expected results is compared to $$$ spent. It's not a cheap upgrade and it can't be done through ebay.

Hate to point it out to you, but the NHP is made in China "cheap" stuff.