Throttle Body Shop TBS 10201 1/4" TBI Injector Spacer 1986-95 Gm TBI Motors This spacer raises the injector assembly on your throttle body and allows 15% more air flow into your engine. More air means more power Fits: 1986-95 2.8L 4.3L 5.0L 5.7L 7.4L TBI motors Silverado Sierra Suburban Yukon Blazer Camaro Firebird Caprice S10 Jimmy Includes extended injector mounting screws and instructions - no gaskets needed Injector spacer design may vary from photo shown - function is garuanteed 2nd photo shows typical TBI injector assembly these fit