What are the pros and cons of the different materials ? I am seriously thinking of a air dam for my 240 and they come in fiberglasss and urethane as most every one knows. Price is not the issue here . I have heard that the urethane are flexable but do flex to the point that they are not effective is this so ? If they flex to this point is it difficult to keep the paint from cracking? What I specificly am looking at is Motor Sports 50- 1402 and 1411 thanks for your input . I am not looking as a racer but as a driver that would like the stability improvement for the ocassinoal faster travel . Gary PS also to show a ricer the tail lights once in a while.

I'd stick to fiber, IF you can remember not to pull into the parking curb!

The paint is cracking off my new urethane dam .... Dam!

Sorry Victor, but if the urethane was prepped right, it shouldn't be flaking off paint like that...

I'll stick with urethane airdams.... think of it this way, if you crack the paint on the fiberglass one on something, you probably just cracked the airdam too...

I've got a urethane airdam that was on the ITS car when it went into an embankment front end first... some of the paint did chip off, but it's useable as it is not hurt at all...I've never seen a urethane deform at race speeds enough to be noticeable from the pit lane...

If you go with urethane, be sure whoever paints it, sands it, primes it, and most importantly puts the right amount of flex additive in the paint.

iI have talked with my painter and if I do go for the airdam I will favor the varithane . Thank you everyone.