Hedman Hedders Uncoated Long-Tube Engine Swap Headers to Install a 351W in 1964-73 Ford Mustang 88660 1971-chevrolet-p30-van-esi8636923 Is the ALL46420-30 pre-assembled or

Is the ALL46420-30 pre-assembled or does it require crimping

"text":"It is a hex head steel nut with a zinc oxide finish and a nylon insert

"name": "What material is the spring made from

is natural stainless steel

2KW Description_DES Ford 221-351W Description_DES Std

Hedman Hedders Uncoated Long-Tube Engine Swap Headers to Install a 351W in 1964-73 Ford Mustang 88660 1971-chevrolet-p30-van-esi8636923 Is the ALL46420-30 pre-assembled orHedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing Ford Mustang headers for nearly as long as Mustangs have been on the road. 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 exhaust system to bolt up to these 351W engine swap headers, even