I've raced a 1st generation tundra when I had about 1/2 of my mods. I know he had exhaust work, maybe a little more. Anyway he gave me a good run, but I had him by about 1.5 lengths to 70mph. I would really like a chance at a 2nd generation Tundra. It would be a really interesting race, especially a RCSB. Never got the chance yet.