just install flowmaster muffler

[lasvegash2]

i just had the local shop install a flowmaster 70 series big block II version muffler. it has a nice rumble at idle and at cruising it has a nice mellow tone but when you full throttle you know you have a flowmaster muffler on. they told me that i could of gone with the 50 series big block version which is a little louder but i would of have had some interior drone at certain rpms.

[gsmith9898]

did you notice and power difference or mpg?

[lasvegash2]

didnt notice any gains in mpg but that is because i cant keep my foot out of the gas pedal. hp i cant really tell but that is probably because i am running 38.5" tires

[gsmith9898]

what is the part numbers for the 70 s?

[tomp]

surely you lost some low end grunt with that muffler

[lasvegash2]

part # is 524703. i drove it normal today and my mpg used to be 8.9 with the stock muffler/normal driving and with the flowmaster it went to 10.0 i did lose some low end torque.

[Htothe2]

y do u lose low end torque?