Headerback systems yes.But you wont find something in a box that fits from the manifolds to the headerback systems.,Im sure something could be custombuilt even though the tubing may need to be alitle ovalized in places,its not alot of space left over where the starter transbellhousing(and clutchlinkage if its a manual trans car),floorboard ,framerail and torsionbars are all trying to occupy the same space. 2½" headpipes are available and kind of a tight fit as you may already have noticed.