Hey Larry, Both 2.5 and 3" will get the job done. I would look at quality, fit, and muffler sound that you like. I ran 11's with a 2.5" exhaust and summit cheapy turbo mufflers and ran 10's with 4" flowmaster loud pipes! The current Borla system fits in all the factory mounting locations and is made of SS. I picked it up off the Summit clearance counter for under $300. I like the flowmaster sound a little better than the borla but price, fit, and quality won out. Here are a few pics of the system http://www.personal.kent.edu/~wbainey/BORLA.htm
Walt http://www.personal.kent.edu/~wbainey/CHEVELLE.htm ----- Original Message ----- From: Larry Shouse <[EMAIL PROTECTED]> Date: Monday, November 28, 2005 4:06 pm Subject: [Chevelle-list] Exhaust System > It's time to buy me an exhaust system. The system will go on a > fairly healthy normally aspirated 396 running L78 heads and > Sanderson intermediate headers with 1 7/8" primaries and 3" > collectors. Those of you in the know, please help me decide > whether I should go with a 2.5" system or a 3" system. Also, brand > suggestions would be great. > > Thanks, > Larry Shouse