Hey guys I bought my car almost a month ago, they guy gave me a light weight flywheel with the car and i heard that it can add up to 10% hp but it can also make a slight rattle, anybody experienced this before or have any advice if i should swap it out or not?

 

If you are talking about a light weight aluminum flywheel
Yes, they will increase drivetrain noise and if this vehicle
is your daily driver no I wouldn't install it.
A Steel flywheel would be a better choice and will still save
some weight coming from the heavy stock OEM flywheel.

 

I have a feeling he is talking about clutch shudder, not the actual noise increase.

Clutch shudder is something you will feel in the clutch pedal when it is partially engaged, but I wouldn't consider it a "rattle."

 

I thought he was talking about the actual flywheel.

 

I love my Exedy Twin plate clutch's "janky" sounding noise when the pedal is in. It will make the person next to me at a light turn and look at me like "W T F mate!?" when I push the clutch pedal in to put her in 1st.

 

in his make believe subaru