If you’re not familiar with the name Arlan Lehman, we’re not surprised. Lehman is the original founder of the go fast engine shop LRD Performance. Having worked with and built championship winning engines for many legends of the sport, it’s safe to say Arlan has had his hands in the ATV industry since its beginning. Now operating under the alias of LED Performance, Arlan can be found working out of his small, two-man shop, custom building exhausts and hand porting cylinders the way he’s done it for over 30 years. Here he explains a little about porting a 310 cylinder.



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