GM TBI 40hp power up kits. Includes 1/4" thick injector spacer (design may vary), 14psi regulator spring and instructions on modifying you OEM stock TBI base to add enough fuel and air to support up to a 40hp gain. Adds 12-1...

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GM TBI 40hp power up kits. Includes 1/4" thick injector spacer (design may vary), 14psi regulator spring and instructions on modifying you OEM stock TBI base to add enough fuel and air to support up to a 40hp gain. Adds 12-16hp on a stock 5.7L TBI motors. Great for motors with headers, air intake and small cam upgrade

  • GM TBI power up kit. Includes impervious to gas polymer injector spacer (design may vary), 14psi regulator spring and instructions on modifying your OEM stock TBI base to add enough fuel and air for up to 40hp gain w/ power adders such as headers, free flow exhaust intake and small cam upgrades. Adds 14hp on a stock 5.7L TBI motor.
  • Fits: 1986-95 2.8L 4.3L 5.0L 5.7L TBI motors Silverado Sierra Suburban Yukon Blazer Camaro Firebird Caprice S10 Jimmy. Although this kit will fit 7.4L TBI motors, most came from the factory with a spacer. Please verify before purchase
  • The spacer takes the place of your original gasket - no gasket required
  • GM TBI power up kit. Includes impervious to gas polymer injector spacer (design may vary), 14psi regulator spring and instructions on modifying your OEM stock TBI base to add enough fuel and air for up to 40hp gain w/ power adders such as headers, free flow exhaust intake and small cam upgrades. Adds 14hp on a stock 5.7L TBI motor.
  • Fits: 1986-95 2.8L 4.3L 5.0L 5.7L TBI motors Silverado Sierra Suburban Yukon Blazer Camaro Firebird Caprice S10 Jimmy. Although this kit will fit 7.4L TBI motors, most came from the factory with a spacer. Please verify before purchase
  • The spacer takes the place of your original gasket - no gasket required

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