Features 1. Fitment: Designed for V-belt systems only, fit for Chevy alternators with 6.56 inch, center to center bolt holes (12si style alternators). When using the OEM size pulley, the alternator bracket will use a 44" V-belt. Perfect fit for Chevy SBC small block engine 350. Fits for SBC engines with long water pump. 2. Function:Used to replace your old lternator bracket, dress up the front of your engine and keep the V-belt tight by using the integrated turnbuckle tensioner attached. 3. Easier Work:Installed it on the upper part of the passenger side and requires a 90 degree water neck. Alternator installation location: passenger side (United States) (Note: Alternator Bracket Type is Upper and lower Brackets. The Lower Bracket Mounting Style is Water Pump Mount.) 4. Superior Material:These tools arrives milled from super-tough billet aluminum. It has the ability to bear heavy loads. CNC process precision manufacturing,sturdy and durable, impact-resistant, corrosion-resistant and wear-resistant for a long-term and reliable performance. Fitment Designed for V-belt systems only, fit for Chevy alternators with 6.56 inch, center to center bolt holes (12si style alternators). When using the OEM size pulley, the alternator bracket will use a 44" V-belt. Perfect fit for Chevy SBC small block engine 350. Fits for SBC engines with long water pump. Note -Installation instructions are not included, professional installation is highly recommended, if you don't find the item you want, please , we will do our best to help you, thank you for coming. -If you are not sure whether it is suitable, please before purchasing and attach your vehicle information. Specification Material: Aluminum Alloy Color: Silver Size: 21 x 12 x 4 cm Weight: 600 g Package Include: alternator bracket, turnbuckle, bolts and spacers Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.