Are single mass and lightweight the same thing? I've never heard of a single mass...

 

Usually, yes, single mass flywheels are lightweight. A single mass flywheel is typically one piece of billet aluminum or steel. Dual mass flywheels are two-piece (plus springs and what-not). A Google search could help with further explanation.

 

it has a recipt in box saying audi tt will this still fit my a4 with it being single mass flywheel and for tt

 

i know its the same engine as the tt but just want to make sure also that it says solid flywheel on receipt which i would say is a single mass could i still put it on my a4

 

dont thing so. im pretty sure the transverse transmissions had a different input shaft spline pattern