I have a few questions regarding the two mufflers as I am interested in buying one of them.

Which one has a louder sound? DB would be nice (I already know the HFP is at 93DB).

Does the HKS Hi Power fit the GD3 good as is...so no readjusting or heightening?

Which one has better HP gains (I kinda assume the HKS Hi Power...?)

Thanks!

 

I had both.
HKS is louder by a good margin but also made more power.
I'm sure on my AT the HKS would exceed the 93 db.
Both fitted good with no mods.

 

Neither is really going to give you more power, its just a muffler, its not a whole exhaust. If you're looking to increase power you should probably choose another car.

 

TRUTH!!

 

haha. that's true.

well try tanabe medallioin its not loud but you will feel something there. just try if you don't like it. well sale it.

 

one is loud and does not look that great, one is quiet and looks good, but hangs very low.