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These fan assemblies are set up for upstream applications
75 in (121 mm) OD - KNRX-4040-1
Manufacturer's Part Number: 743-3500
9" tall overall
Manufacturer's Part Number: ATI918586
ARP Buick 350-455 3/8" hex SS header stud kit 420-1411 Inverted Adapters These fan assemblies are setARP Buick 350 455 3 8" hex SS header stud kit (420 1411) ARP Stainless Steel Header Stud Kits 420 1411 Headers can represent a sizable investment, so you'll want to keep them securely attached. In addition, exhaust leaks can cost you power and even cause damage to your vehicle. ARP stainless steel header studs are the answer. They're made from premium 300 stainless steel, which is rated at 170,000 psi tensile strength much stronger than Grade 8 steel.