Havlir House of Fabrication Headers for your AV8 conversion Will work with F-1 steering box These will clear un-split wishbones 5/16 thick flange material 1 5/8 primary into 1 3/4 575.00 for individual flange + shipping Please feel free to call with any questions 804-245-1959 Dave Havlir Additional Info.... Exhaust system flanges are now included in price.