B13-10 for 944 2V race Best power band 4400-7200 rpm. 1100 rpm idle. Off idle lope. .539 cam lift (In & Ex). 110° LSA. Modified hydraulic lifter gallery required. Race valve spring & retainer package required. Motronic will not work. Bhp available depends upon tune of engine. No equivalent competitors cam. Used where lift is un-restricted but racing cam is allowed. Can be ground in LSA 106° to 112° for application optimization.