Type: TBI 40hp Power Up Kit. 1 Set TBI 40hp Power Up Kit. A 1/4" TBI injector spacer w/ extended mounting screws. For 1986-1995 Twin Injector TBI 2.8L, 4.3L V6 or 5.0L, 5.7L V8 For most commonly found in full size Chevrolet and GMC full size Silverado and Sierra trucks, mid size S10, Blazer, SUVs like Yukon, Suburban, Tahoe, Camaro, Firebird, Cadillac, Caprice and more.
