So why does the stock exhaust sound much better on the LC when both LC and GSF have the same motor what did Lexus do diff with the LC? Also the aftermarket exhaust that are being made for the LC sound diff then the GSF aftermarket ones.........

So I was told by a vendor that if I do the Apexi mid pipe with the Tom's axle back on my GSF it will not sound like this LC check out this link let me know what you think.............

 

Hearing both in person at Lexus event - LC sounds so much better and louder.
Lexus really focused on the great sound for the LC.

 

They have the same motor, but the exhaust is different.

 

The LC has a tweaked intake/exhaust system, thus the difference in sound and slight increase in power/torque.

 

Want to sound equal or BETTER:

Short Answer = Blueprint:

 

That would probably cost and arm & leg...

 

 

Header config, resonators, mufflers, tubing diameter. Match them and you'll get the same sound.