Review on Chevy TBI Open Spacer by Trans-Dapt - Model 2633 by Tom Beland

I bought this hoping it would add some horses to my tbi 350 chevy. Well, not only did it add a few extra horses, it also increased my mileage by about 1.5mpg! This is a great product to use when you are looking for a little more grunt from your engine. It bolted on nicely and you will most likely need the Trans-Dapt fuel line extensions as they really come in handy. I only needed to fit the left extension as I also bought an Actron fuel pressure gauge and used the fitting as an extension for the right side line. Overall this shim worked great and showed great results for my application; Stock Chevy 350tbi