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When the need for something other than a small-tube street header arises, Hedman Hedders can provide a variety of options. The headers shown, Hedman PN 75110, fit '64-'66 A-Bodies. The 1 7/8-inch primary tubes require a serious engine to reach their full potential. Headman PN 75140 fits '67-'76 models. Although these headers are too large for a stock 318, they work exceptionally well on modified powerplants.