Feature: 1. Fitment: Replacement for ; Replacement for ; Replacement for ; Replacement for ; Replacement for , etc. 2. Applicable Model: Fits any square bore carburetor, like the replacement for 4150 4160, for Barry Grant, for carter and for that are used on many Small or Big Block engine. 3. Improving Distribution: Square bore carburetor spacer is used to extend the length of the intake mixture column, thereby improving air and distribution. 4. 4 Hole Open Center: The open design increases the volume of the plenum chamber to increase , and the 4 hole design increases the mixing speed to improve low speed and mid for range torsion. Specification: Item Type: Carburetor Spacer Material: Phenolic Plastic + Metal Size: . 2in / 5cm Fitment: Replacement for , Replacement for , Replacement for FITS ANY SQUARE BORE CARBURETOR, like for 4150 4160, for Barry Grant, for carter and for that are used on many Small or Big Block, Replacement for , Replacement for engines. Color: Black Package Contents: 4 x Screw 3 x Carburetor Spacer 4 x Nut Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.