Are these factory spring-loaded cutouts?
These are there on the L99 'verts to reduce exhaust noises heard during Active Fuel Management. They look like spring loaded exhaust cutouts to me.
James 1:25 Ordered from Faulkner Chevy #NKCF02 1100 5/8/9 2000, 3300 7/16/9 TPW 7/20,GOT MY (low) VIN! 4000 7/24/9 ,Picked up 8/7/9!!! Signed Litho #45. Car signed by FBodfather 2011. Service: Jennings Chevy in PA. We don't "drift", kiddies... we POWER SLIDE!
MOTM/COTM Sept 2012 Pro Patria Vigilans
Click the pic.. I don't tolerate fools.