Have not had a chance thus far to race a Tundra, but I keep looking,lol. I have the MOPAR CAI and the DS intune. I am running the DS tune on it, a.k.a 93 octane. It is rated at 30 more hp and 35 more torque. I just know it runs a hell of a lot better tuned. When I jump on it the SOB will smoke the tires for about 1-3 truck lengths. No joking, it scared me the first time I tested it,lol. It is so far the cheapest added power. I would like to add the magnaflow exhaust some day, but for now I am happy.