throttle body spacers

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by ss_silverado_phoneix99325, Nov 10, 2007.

  1. Have a 99 silverado 5.3L. Anyone have any luck with theses spacers. Do they really work? Do they really get maybe 2 miles more per gallon. Looked at poweraid and others. SOme helix the air into the engine, some do not. Which are better. Please help.
  2. finalday7

    finalday7 Epic Member 5+ Years ROTM Winner 1000 Posts

    No I've done quite a bit of reasearch on this and all answers lead to Waste Of Money. Sorry it sux.
  3. dwill3015

    dwill3015 Epic Member 5+ Years ROTM Winner 1000 Posts

    I have installed them on 2 vehicles I own and I was impressed with increased performance in both cases. There are not a lot of bolt-on performance parts for your application so every bit helps. Exhaust, cold air intake, programmer, and the TB spacer is about all you can play with.

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