Hedman Hedders ELITE Hedders; 1-5/8 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design 68298 1991-mazda-mx-6-esi8938686 Flowtech recommends using cast iron

Flowtech recommends using cast iron exhaust manifolds or old heaters to break in a new engines to aviod coating damage

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----Mishimoto takes pride in the durability and reliability of our products

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Make Oldsmobile Voltage 50

Hedman Hedders ELITE Hedders; 1-5/8 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design 68298 1991-mazda-mx-6-esi8938686 Flowtech recommends using cast ironHedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing long and MID LENGTH tube headers for Chevy passenger cars for decades. Each set uses mild steel, smooth flowing, CNC mandrel bent tubes, that are hand welded to ensure each pair is identical to the next. Hedman's unique, gasketless ball and socket collector design allows your Small Block Chevy exhaust system to bolt up, even if it is not