> I believe the A3 and C302B take the same header gasket. It depends upon how far they have been ported: Exhaust gasket: Fel Pro p/n 1417: A3 cylinder heads (1.94" diameter round port size) Fel Pro p/n 1431: B351/C302 cylinder heads (1.81" diameter round port size) Fel Pro p/n 1433: Yates cylinder heads (1.86" x 1.68" port size) Dan Jones