Want to have more of a blow off valve type noise without expensive pipes, and blow off valves? The Forge Diverter valve does the trick and its easy to install, and affordable !
Review and demo of the Forge Diverter valve from a Cobalt LNF Turbo owner.
http://www.youtube.com/watch?v=nTn4AydrsTY
Link for more info and pricing:
http://www.modernperformance.com/forge-diverter-valve-0810-cobalt-turbo-p-2211.html
http://www.modernperformance.com/forge-diverter-valve-0810-cobalt-turbo-p-2211.html