ok, well im goin to a muffler shop and getting the pipes for a catback and i want to choose from either a ravin muffler or a flowmaster 40 or 80 series, which is the loudest? and i have a 90 iroc 350 tpi, with kn's, airfoil, all those things should i get 2 and a half or 3 inch exhuast pipes any help would be great, thanks

 

id say go with the flowmaster 40 series, the 40 series is the louder of the flowmasters, and with a 350 tpi, go with 3" exhaust.