Quote Originally Posted by dave parker View Post
Many people will laugh at this but it works:
A running drivable (preferably street legal,if possible) version of the car that you are racing for all those little bits that you never knew that you are going to need.

Especially if you are doing endurance racing.

cheers
Dave Parker
I can vouch for this one - I took the entire fuel pump assembly off of a street car and mounted it to my race car at the track the night before my first win.