B13-12 for 944 2V race Best power band 4400-7000 rpm. 1100 rpm idle. Off idle lope. .539 cam lift (In & Ex). 112° LSA.  Modified hydraulic lifter gallery required. Race valve spring & retainer package required. Motronic will not work. Needs aftermarket engine management.  Bhp available depends upon tune of engine. No equivalent competitors cam. Used where lift is un-restricted but racing cam is allowed.   Could be used for Turbo or NA applications.  $850