| Do you have bigger tires on? (need to know the RPM you are experiencing it at) I have mine straight piped and I only get a drone at 2200 rpms. (about 72mph) Other than that, I only can tell it is straight piped while I am driving in town....on the highway it is only slightly louder..barely noticeable.
__________________ 2004 GMC 2500HD D/A CC Carbon Metallic w/ LB7
4" turbo back MBRP exhaust
TST Powermax Programmer, Diablosport Predator
285/75-16 BFG T/A KOs, Eagle Alloys Series 187
Clifford 2 way remote start, High Idle, Bilsteins
Extang Classic Platinum Tonneau Cover
AFE Magnum Force Stage 2 Proguard 7 intake Kennedy Diesel Merchant Automotive My Photos |