Good product but mislisted. The part number is advertised as T9134, an open discharge chamber, but this item has four openings in the discharge area. The advertised part number for the open chamber should be R9136.
Good product. There were no lug length issues as reported by other reviews. Installed on my Mercruiser I/O with a Edelbrock Marine carburetor on top, works perfectly.
Pros
packaging dimensions: 22,098 LX 3,047 HX 20.32 W (centimeters)
Open spacer expected and received. Change of plans, so I'm porting this one now, which may be better or junk. It's not flat and wouldn't want to use it as a straight screw.
Racing Power R9134 is a 4 hole spacer, not an open gasket as shown in the description. If you require an open seal the part number is R9136 - https://www.amazon. com/Racing-Power-R9136-Carburetor-Spacer/dp/B004PL8YSA/ref=sr_1_1?ie=UTF8&qid=1492441855&sr=8-1&keywords=r9136