Exhaust Manifolds
I guess you guys don't like the idea of somebody doing research on a modification to a car whether they have it or not. I did my research on quad runners long before I bought one and by me doing this I was able to find out that the one I was interested in had what's called differential lock, now that and it being 4 wheel drive it pulled strong. Doing research before making a change to one's car could very well save the owner not only time but money as well, they may even decide that the modification that they were considering doing wouldn't help them reach their goals.