123 IGNITION. ( PORSCHE-911-SMALL-6-R-V ) Digital ignition. Manual program adjustment. With vacuum. Designed for Porsche 911 2,0L and 2.2L 6 cylinder engines. The unit offers a maximum total of 16 advance curves to be selected by the end user. Install may or may not require Porsche Spacer Ring depending on vehicle & distributor - sold separately. Please view www.123ignition.nl for list of curves.