European Racing Headers Cayman 981/GT4 Headers Posted by GT Racing on 23rd Apr 2017 Testing day with the new Cayman 981/GT4 European Racing Headers installed on a 2015 Cayman GTS at Pikes peak International Raceway. #981 headers #cayman #cayman headers #gt4 headers #porsche 981 headers #porsche cayman headers #porsche gt4 #porsche gt4 headers #Porsche Headers