Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Smooth Bore TBI Adapter/Spacer 1987-90 GM 7.4L or any 2" TBI to 5.0L/5.7L
This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
- Smooth Bore TBI Adapter/Spacer
- 1987-90 GM 7.4L or any 2" TBI to 5.0L/5.7L
- 1.75" Manifold
This original design, Smooth Bore TBI spacer increases plenum volume and air velocity for respectable horsepower and torque gains throughout the entire RPM range.Note: Not legal for use or sale in any state complying with California regulations.
Trans Dapt's Throttle Body Injection (TBI) Spacers and adapters are available in three styles to improve the quality of engine air/fuel mixture for increased intake manifold volume. Trans Dapt TBI spacers provide better throttle response, fuel efficiency increases of 8 percent or more and significant torque gains throughout the rpm range These TBI spacers are designed for easy bolt-on installation and are 50-state legal (EXCLUDING 2539, 2639, 2737, 2739), and covered by The C.A.R.B. Executive Order #D-578.
Show More
Swirl-Torque TBI Spacers
The slotted port design of Trans Dapt's Swirl-Torque TBI Spacers creates a vortex for better air/fuel mixture that improves low-to-mid range torque. More torque results in unsurpassed power gains, smoother acceleration, and better fuel economy.
Wide Open TBI Spacers
Wide Open spacers are designed for wide open throttle use and towing applications. With the open plenum design, these TBI spacers promote improved mid-to-high end torque.
Smooth Bore TBI Spacers
Throughout the entire RPM range, these Smooth Bore TBI spacers increase plenum volume and air velocity that results in horsepower and torque gains.
