I am not sure about the tweeks kits, but I have ordered fiberglass parts from pelican and
www.americaninternationalracing.com I found the quality to be roughly about the same, just with some differences. the parts from AIR have a black textured fiberglass finish on the underside, where the parts from pelican are smooth. I could also see through some pin holes when holding up the pelican flares to bright light, cannot see that with the AIR. the flares from AIR are built with a "rolled" lip, for more clearance, where pelican have the "stock" lip.
[This message has been edited by derek_sf (edited 11-04-2001).]