Ours work as advertised for most all Guzzi with 02-sensors, including big block CARC Guzzis. Does NOT work for '13-current V7 models OR California 1400.
If your big block Guzzi has two 02-sensors stock, then you would need to purchase two (2) 02-Optimizers. After you place your order, we will contact you for model info. If so, seriously consider our GTM® ECU Flash Tool