I put dyna-mat under the rear seat, and up the axle well behind the rear back rest, jute behind the devider board. much quiter inside the car now. There's still a very faint drone at 45, not obnoxious but I can tell it would be 100x worse with out the deadner

Manifolds
TTI 2.5"
X-pipe
Dynomax muffs


Current cars: 2000 Dak Quad Cab, 2012 Challenger,1970 Road Runner, 1994 Firehawk


1966 Coronet post sedan, 1988 Corvette, 2005 Magnum RT all SOLD

R70RUNNER<---VP Inland Empire Chapter of the MPM