For guys with lts, is there a noticeable difference in cab noise from stock. I do a lot of long trips and I do not want the increased cab noise.

 

wrap them.... google reduce drone by wrapping etc....

 

my long tubes are very noticeable in the cab, in fact i thought i had an exhaust leak after the install. during light throttle you can hear a slight tiny sound from under the dash, must be the valve train noise or the sound of each cylinder firing coming thru the thin long tubes. I like the sound.

 

Installed my Longtubes with 3" piping and a magnaflow, and it sounds A LOT quieter than what I had with my stock manifolds, no cats, and the magnaflow.. well that is until I floor the pedal then it sounds Bada**

04 GMC Sierra Exhaust - YouTube

 

Ive got pacesetter LT's through the ORY and stock muffler/tailpipe.. It makes noise in the cab but its not bad enough to bother you on roadtrips, I mostly hear mine when its high engine load, cruising rpm with the radio off.. When your on the highway at 70-75 mph the wind and normal highway noise will cover up the sound of the LT's.

 

I have Kooks 1 7/8" LT headers. It is noticeable in the cab. I have feel the vibrations through the floor boards, but it is worth it to me.