AussieSpeed retro style v6 Chevy valve covers will clear roller rockers & replace late model plastic valve covers as used by Chevrolet,GMC,on S10 pickups,Typhoon & Syclone mini trucks, Austro Vans & all other 4.3L/262 90 degree v6 1986 onward powered engines. The covers will also suit marine application & will replace plastic & pressed factory tin rocker covers as fitted to Mercruiser, Volvo Penta, OMC pleasure craft. These covers are Hand molded Australian made with internal cast ribs,fully molded gasket retaining lips & cast engine breather boxes.The AussieSpeed tappet covers are strong sand cast covers that wont rust or warp. These covers will fit 1996 on vortec engines to replace the plastic valve covers