Primaries: 1.75"
Port Shape: Oval
Port ID: 1.85" X 1.65" ID
Collector: 3.0"
Outlet: 3.0"
Main Piping Size: 2.5"
O2 Bung: 1
Disclaimer: “For off-road competition/racing use only. This product is not intended to be installed on vehicles registered for highway use. LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES THAT MAY NEVER BE USED, OR REGISTERED OR LICENSED FOR USE, UPON A HIGHWAY.”