I am going to get an undertail but not sure whether to get plastic or fiberglass. I see alot on ebay and some of them says to stay away from fiberglass due to it cracking and paint chipping easily. Anyone know if this is true plus what does everyone else have. Thanks in advance.

Tom

 

They've been making car bodies out of fiberglass for years. The front ends of corvettes are know to crack here or there, but it would be much worse if they were plastic. I'd say fiberglass is the way to go for strength.

 

Strenght isn't always good...flexability is much better and can handle the vibration way better...easier to paint, would take more power the crack it...so i say plastic is better...ABS plastic i mean

 

I agree xmunxjai648, ABS plastic will hold a better finish and match the rest of your body panels better. Have you ever noticed the discoloration on the nose of an older car... well there's your answer really. The only advantages to fiberglass is the weight reduction overall and the fact that in whole it is cheaper to replace. But when you are looking at only undertails you're not going to see much savings. I say the easiest way to pick out an undertail is the light design, because trying to add turn signals after will only end up looking like a hack job. Hotbodies has a nice undertail with shotgun LED brake lights and led strip signals. 58cycle.com has them on sale right now colormatched to any stock f4i. in either case you will kick sand and rocks up on it if you don't have a wheel hugger, it can easily be thrashed after a single summer without.