b'GM F/X Fender Flares AXT-STAR & AXT-HERO Require Wider Fenders for 315/335 Tires: Build Tip: Widening steel fenders and/or making steel fender flares requires a skill set different than working with fiberglass. If you have the skills to do bothor the shop/friend you utilize has the skills to do bothwe suggest the steel route, even if its a little more cost. If you/they have neither skill setand you want to learn & Do-It-Yourselffiberglass will be easier.Fiberglass is a pain in the ass, but learning to do fiberglass work is way quicker & easier than learning sheet metal skills. If you make a small mistake in fiberglass, you can grind it, refill it with resin & correct it. If you make a large mistake in fiberglass, you can cut it off & start over. Frankly, working steel well takes years to learn, not weeks. But, there are preformed steel fender flares available these days to make steel flares much easier. Go HERE. Warning:Pay attention to the phrase widened wheel openings. These are NOT flares. These are lengthened wheel openings for drag race cars to put 32-34 tall slicks in the fender.Fiberglass is more susceptible to damage in small incidents, but at speed steel & fiberglass can both be easily damaged. If you damage fiberglass in an on-track (or off-track) excursion, it is relatively easy & affordable to repair. Steel can be quick & easyif you have the skill setotherwise steel repairs outsourced are very costly. Your call. Giddy up! Fender Flare & Widening Instructional Videos on the Web568'