I had all the mods in my sig except the JWT cams and headers when I beat the first guy in his DC and I was sporting 4 cats instead of two in preparation for my header install. The second time I ran a Tundra DC I lost and that was with the headers and generic header tune. They are quick for a brick and If you plan on competing with a near stock truck, you won't be, you will just be getting whooped on. Let your buddy have his fun and don't wimp out on him. Take your beating and keep on modding, it's cheaper than a new truck and a lot more fun. The first thing to get is the UpRev tune and as Toomnymods stated it's worth at least .6 in the quarter, I got .8 out of it. good luck and take it like a man, there's always someone faster than you but race like it's the last one anyway.