1LE build and Journal - SUKXOST [COTW 12/31/12]
View Single Post
11-28-2012, 08:08 AM
Drives: 2008 Silverado
Join Date: Dec 2010
Are the NPP mufflers normally closed on the inside pipe? And the engine vacuum opens them? Or is it the opposite?
View Public Profile
Find More Posts by BlkSlvrdo129