The length of the wastegate pipe and the location of the outlet both make a difference in the sound level.
Mine is about 8" long and has a 90* bend at the end pointing it toward the ground. With a stock Euro muffler there is a marked transition from the growl of an excellerating engine to "the gates of hell" opening up when boost hits. Loud when you want it to be.
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8