Here are my examples:
1. Homebrew Powerstack FIPK $60, K&N FIPK $240, Saving $180
2. Homebrew 62mm bored TB $11, Accurate Power 62mm TB $200, Saving $189
3. Homebrew MAP adjuster $9, Turbo City MAP adjuster $94, Saving $85
4. Homebrew CTS 4Kohm parallel resistor mod $1, JET fan switch $39...