Here are some photos of my Rustler that I race at my local track. The Losi and Asscoiated guys think it's a joke until I run them down. It's very competitive even though it's a bit heavier than the "race" stadium trucks. The extra heft atcually helps with the brushless keeping it planted on the ground. What it really comes down to is track time and suspension tuning.
RPM rustler front arms
Traxxas Aluminum Front Castor Blocks
RPM front bearing carriers
Rear suspension: Proprietary set up
Big bore shocks
Front shocks: 30 weight no preload spacers
Rear shocks: Proprietary set up
Rear axles level, arms slightly below level
RPM Revolver wheels front offset on all four
Proline Holeshots all four, green compound
There are also a couple of proprietary "fixes" to various parts which really makes it competitve.