Isn't it illegal to add any additional gas tank devices? I was looking into this a while back and everything I read said it's illegal.#1 Replacement 40 gallon LRA main fuel tank. Hands down my favorite modification to the 100. It "fixes" what I consider the achilles heal of the 100 series: range. It requires no fancy bumper with a swingout, no high dollar roof rack, no lifting gas cans over your head, no potential thievery or forgetting the spout to a gas can. If I buy another 100 series, the big gas tank will be the first modification I do.