I'm starting to hear some blowthrough from the original "mufflers" on my GP (# 487) 68k miles. Any consensus on aftermarket replacements? Thanks.

 

I have the Milltek (Stratmosphere) exhaust. A little louder than the JCW which is what I wanted but without any interior drone when cruising. Also the muffler cans are a little smaller than the JCW mufflers so they are not seen from the rear. I think the Milltek (Stratmosphere) is a good compromise between loudness and drone.
http://www.waymotorworks.com/stratmo...3-hardtop.html

I tried the Borla Sport and thought it had a little too much interior drone for the GP. However, the Borla sounds great when you accelerate.